diff --git a/data/blob.ttl b/data/blob.ttl
index f06ada7..aa6f36d 100644
--- a/data/blob.ttl
+++ b/data/blob.ttl
@@ -1691,12 +1691,6 @@ prefix library: <dokk:library:>
     :primary_source_retrieved "2023-04-06" ;
     :type "PDF" .
 
-<dokk:blob:pdf/introduction_creative_commons_licensing_Poritz_2019.pdf>
-    :library library:introduction_creative_commons_licensing_Poritz_2019 ;
-    :primary_source "https://poritz.net/jonathan/share/I2CCLOEAW2019.pdf" ;
-    :primary_source_retrieved "2023-04-06" ;
-    :type "PDF" .
-
 <dokk:blob:pdf/introduction_programming_java_4.1.pdf>
     :library library:introduction_programming_java_4.1 ;
     :primary_source "https://math.hws.edu/eck/cs124/downloads/javanotes4.pdf" ;
diff --git a/data/library.ttl b/data/library.ttl
index 4d0ba50..f8d335b 100644
--- a/data/library.ttl
+++ b/data/library.ttl
@@ -1459,11 +1459,6 @@ prefix license: <dokk:license:>
     :title "Fair Use Checklist for Indiana University" ;
     :license license:CC-BY .
 
-:introduction_creative_commons_licensing_Poritz_2019
-    :title "Introduction to Creative Commons Licensing: The Key to Using the 5Rs of OER with Confidence" ;
-    :license license:CC-BY-SA-4.0 ;
-    :author "Jonathan A. Poritz" .
-
 :introduction_programming_java_4.1
     :title "Introduction to Programming Using Java Version 4.1" ;
     :license license:GFDL-1.1-no-invariants-or-later ;