diff --git a/cave_data/1623-2005-91.html b/cave_data/1623-2005-91.html
index 639222821..33f48291a 100644
--- a/cave_data/1623-2005-91.html
+++ b/cave_data/1623-2005-91.html
@@ -34,7 +34,7 @@ the form documented at
 <survex_file></survex_file>
 <underground_description></underground_description>
 <equipment></equipment>
-<references></references>
+<references><a href="/logbookentry/2005-07-28/2005-07-28b#">logbook 2005-07-28</a></references>
 <survey></survey>
 <notes></notes>
 <length></length>