diff --git a/lib/api-request.js b/lib/api-request.js
index 1c1fcd7d..9eb1f3d8 100644
--- a/lib/api-request.js
+++ b/lib/api-request.js
@@ -8,7 +8,7 @@ const QUOTE_CHARS = '"\u201C\u201D\u201E\u201F\u2033\u2036'
 const IN_QUOTES_PATTERN = new RegExp(`^[${QUOTE_CHARS}][^${QUOTE_CHARS}]+[${QUOTE_CHARS}]$`)
 
 class ApiRequest {
-  static ADVANCED_SEARCH_PARAMS = ['title', 'subject', 'contributor', 'callnumber']
+  static ADVANCED_SEARCH_PARAMS = ['title', 'subject', 'contributor', 'callnumber', 'standard_number']
   static IDENTIFIER_NUMBER_PARAMS = ['isbn', 'issn', 'lccn', 'oclc']
 
   constructor (params) {
diff --git a/lib/resources.js b/lib/resources.js
index e7a37210..0594f3ab 100644
--- a/lib/resources.js
+++ b/lib/resources.js
@@ -88,6 +88,7 @@ const parseSearchParams = function (params) {
     items_size: { type: 'int', default: 100, range: [0, 200] },
     items_from: { type: 'int', default: 0 },
     callnumber: { type: 'string' },
+    standard_number: { type: 'string' },
     contributor: { type: 'string' },
     title: { type: 'string' },
     subject: { type: 'string' },
diff --git a/routes/resources.js b/routes/resources.js
index d70fa3b3..852b71c0 100644
--- a/routes/resources.js
+++ b/routes/resources.js
@@ -100,11 +100,10 @@ module.exports = function (app) {
    * e.g. discovery/resources/b1234
    */
   app.get(`/api/v${VER}/discovery/resources/:uri.:ext?`, function (req, res) {
-    const gatheredParams = req.query
     const params = Object.assign({}, req.query, { uri: req.params.uri })
 
-    if (Number.isInteger(parseInt(gatheredParams.items_size))) params.items_size = gatheredParams.items_size
-    if (Number.isInteger(parseInt(gatheredParams.items_from))) params.items_from = gatheredParams.items_from
+    if (Number.isInteger(parseInt(req.query.items_size))) params.items_size = req.query.items_size
+    if (Number.isInteger(parseInt(req.query.items_from))) params.items_from = req.query.items_from
 
     let handler = app.resources.findByUri
 
diff --git a/test/elastic-query-builder.test.js b/test/elastic-query-builder.test.js
index f4384ab7..e75a2968 100644
--- a/test/elastic-query-builder.test.js
+++ b/test/elastic-query-builder.test.js
@@ -156,6 +156,28 @@ describe('ElasticQueryBuilder', () => {
       })
     })
 
+    describe('standard_number=', () => {
+      it('applies standard_number clauses to query', () => {
+        const request = new ApiRequest({ standard_number: 'toast' })
+        const inst = ElasticQueryBuilder.forApiRequest(request)
+
+        expect(inst.query.toJson()).to.nested
+          .include({
+            // Match on bib identifiers:
+            'bool.must[0].bool.must[0].bool.should[0].prefix.identifierV2\\.value.value': 'toast'
+          })
+          .include({
+            // Match on bib id:
+            'bool.must[0].bool.must[0].bool.should[1].term.uri.value': 'toast' // ,
+          })
+          .include({
+            // Match on item barcode:
+            'bool.must[0].bool.must[0].bool.should[2].nested.path': 'items',
+            'bool.must[0].bool.must[0].bool.should[2].nested.query.term.items\\.idBarcode.value': 'toast'
+          })
+      })
+    })
+
     describe('title=', () => {
       it('applies title clauses to query', () => {
         const request = new ApiRequest({ title: 'toast' })