diff --git a/lib/delivery-locations-resolver.js b/lib/delivery-locations-resolver.js
index 38635d7..802b54f 100644
--- a/lib/delivery-locations-resolver.js
+++ b/lib/delivery-locations-resolver.js
@@ -12,7 +12,7 @@ class DeliveryLocationsResolver {
   }
 
   static requestableBasedOnHoldingLocation (item) {
-    const locationCode = this.extractLocationCode(item)
+    const locationCode = DeliveryLocationsResolver.extractLocationCode(item)
 
     if (!DeliveryLocationsResolver.nyplCoreLocation(locationCode)) {
       logger.warn(`DeliveryLocationsResolver: Unrecognized holdingLocation for ${item.uri}: ${locationCode}`)
@@ -166,7 +166,7 @@ class DeliveryLocationsResolver {
         return {
           id: `loc:${location.code}`,
           label: location.label,
-          sortPosition: this.sortPosition(location)
+          sortPosition: DeliveryLocationsResolver.sortPosition(location)
         }
       })
         // Either way, sort deliveryLocation entries by name:
@@ -191,14 +191,14 @@ class DeliveryLocationsResolver {
   }
 
   static attachRecapDeliveryInfo (item) {
-    const info = this.getRecapDeliveryInfo(item)
+    const info = DeliveryLocationsResolver.getRecapDeliveryInfo(item)
     item.eddRequestable = info.eddRequestable
     item.deliveryLocation = info.deliveryLocation
     return item
   }
 
   static attachOnsiteDeliveryInfo (item) {
-    const info = this.getOnsiteDeliveryInfo(item)
+    const info = DeliveryLocationsResolver.getOnsiteDeliveryInfo(item)
     item.eddRequestable = info.eddRequestable
     item.deliveryLocation = info.deliveryLocation
     return item
@@ -212,15 +212,15 @@ class DeliveryLocationsResolver {
     const hasRecapCustomerCode = item.recapCustomerCode && item.recapCustomerCode[0]
     const nyplItem = isItemNyplOwned(item)
     if (!hasRecapCustomerCode) {
-      const requestableBasedOnHoldingLocation = nyplItem ? this.requestableBasedOnHoldingLocation(item) : true
+      const requestableBasedOnHoldingLocation = nyplItem ? DeliveryLocationsResolver.requestableBasedOnHoldingLocation(item) : true
       // the length of the list of delivery locations is checked later to determine physical requestability
       // In case of an offsite item with no recap customer code, we want this to be based on holding location
       // so we put a placeholder '' in case it is requestable based on holding location
       deliveryLocation = requestableBasedOnHoldingLocation ? [''] : []
       eddRequestable = requestableBasedOnHoldingLocation
-    } else if (!nyplItem || this.requestableBasedOnHoldingLocation(item)) {
-      deliveryLocation = this.deliveryLocationsByRecapCustomerCode(item.recapCustomerCode[0])
-      eddRequestable = this.__eddRequestableByCustomerCode(item.recapCustomerCode[0])
+    } else if (!nyplItem || DeliveryLocationsResolver.requestableBasedOnHoldingLocation(item)) {
+      deliveryLocation = DeliveryLocationsResolver.deliveryLocationsByRecapCustomerCode(item.recapCustomerCode[0])
+      eddRequestable = DeliveryLocationsResolver.__eddRequestableByCustomerCode(item.recapCustomerCode[0])
     } else {
       deliveryLocation = []
       eddRequestable = false
@@ -233,7 +233,7 @@ class DeliveryLocationsResolver {
       eddRequestable: false,
       deliveryLocation: []
     }
-    const holdingLocationCode = this.extractLocationCode(item)
+    const holdingLocationCode = DeliveryLocationsResolver.extractLocationCode(item)
     const sierraData = DeliveryLocationsResolver.nyplCoreLocation(holdingLocationCode)
     if (!sierraData) {
       // This case is mainly to satisfy a test which wants eddRequestable = false
@@ -243,15 +243,15 @@ class DeliveryLocationsResolver {
     }
     // if nypl core says it's unrequestable, it can still be eddRequestable,
     // but its definitely not phys requestable.
-    deliveryInfo.eddRequestable = this.eddRequestableByOnSiteCriteria(item)
-    if (!this.requestableBasedOnHoldingLocation(item)) {
+    deliveryInfo.eddRequestable = DeliveryLocationsResolver.eddRequestableByOnSiteCriteria(item)
+    if (!DeliveryLocationsResolver.requestableBasedOnHoldingLocation(item)) {
       return deliveryInfo
     }
     // if nypl-core reports that a holding location's delivery locations
     // should be found by M2 code, but only if the item has an M2 customer code
     const deliverableToResolution = sierraData.deliverableToResolution
     if (deliverableToResolution === 'm2-customer-code' && item.m2CustomerCode && item.m2CustomerCode[0]) {
-      deliveryInfo.deliveryLocation = this.deliveryLocationsByM2CustomerCode(item.m2CustomerCode[0])
+      deliveryInfo.deliveryLocation = DeliveryLocationsResolver.deliveryLocationsByM2CustomerCode(item.m2CustomerCode[0])
     }
     // if no value, default to sierra location lookup
     if (!deliverableToResolution) {
@@ -275,15 +275,15 @@ class DeliveryLocationsResolver {
   }
 
   /**
-   * Given an array of items (ES hits), returns the same items with `eddRequestable` & `deliveryLocations`. We verify all recap customer because our indexed data may be stale. 
+   * Given an array of items (ES hits), returns the same items with `eddRequestable` & `deliveryLocations`. We verify all recap customer because our indexed data may be stale.
    *
    * @return Promise<Array<items>> A Promise that resolves and array of items, modified to include `eddRequestable` & `deliveryLocations`
    */
   static attachDeliveryLocationsAndEddRequestability (items, scholarRoom) {
     // Extract ReCAP barcodes from items:
-    const recapBarcodes = this.extractRecapBarcodes(items)
+    const recapBarcodes = DeliveryLocationsResolver.extractRecapBarcodes(items)
     // Get a map from barcodes to ReCAP customercodes:
-    return this.__recapCustomerCodesByBarcodes(recapBarcodes)
+    return DeliveryLocationsResolver.__recapCustomerCodesByBarcodes(recapBarcodes)
       .then((barcodeToRecapCustomerCode) => {
         // Now map over items to affix deliveryLocations:
         return items.map((item) => {
@@ -292,15 +292,15 @@ class DeliveryLocationsResolver {
           item.recapCustomerCode = [barcodeToRecapCustomerCode[barcode]]
           // If recap has a customer code for this barcode, map it by recap cust code:
           if (item.recapCustomerCode[0]) {
-            item = this.attachRecapDeliveryInfo(item)
+            item = DeliveryLocationsResolver.attachRecapDeliveryInfo(item)
             // Otherwise, it's an onsite item
           } else {
-            item = this.attachOnsiteDeliveryInfo(item)
+            item = DeliveryLocationsResolver.attachOnsiteDeliveryInfo(item)
           }
           // Establish default for Electronic Document Delivery flag:
           item.eddRequestable = !!item.eddRequestable
-          const filteredDeliveryLocationsWithScholarRoom = this.filterLocations(item.deliveryLocation, scholarRoom)
-          item.deliveryLocation = this.formatLocations(filteredDeliveryLocationsWithScholarRoom)
+          const filteredDeliveryLocationsWithScholarRoom = DeliveryLocationsResolver.filterLocations(item.deliveryLocation, scholarRoom)
+          item.deliveryLocation = DeliveryLocationsResolver.formatLocations(filteredDeliveryLocationsWithScholarRoom)
           return item
         })
       })