===================================================================
RCS file: /cvsrepo/anoncvs/cvs/www/plus31.html,v
retrieving revision 1.56
retrieving revision 1.57
diff -u -r1.56 -r1.57
--- www/plus31.html	2018/03/25 03:02:08	1.56
+++ www/plus31.html	2018/10/09 15:12:03	1.57
@@ -74,6 +74,7 @@
 <a href="plus61.html">6.1</a>,
 <a href="plus62.html">6.2</a>,
 <a href="plus63.html">6.3</a>,
+<a href="plus64.html">6.4</a>,
 <a href="plus.html">current</a>.
 <br>