--- Theory.orig	2009-10-21 09:12:41.000000000 -0400
+++ Theory	2009-11-29 02:33:00.000000000 -0500
@@ -360,10 +360,10 @@
 Calendrical issues are a bit out of scope for a time zone database,
 but they indicate the sort of problems that we would run into if we
 extended the time zone database further into the past.  An excellent
-resource in this area is Edward M. Reingold and Nachum Dershowitz,
-<a href="http://emr.cs.uiuc.edu/home/reingold/calendar-book/second-edition/">
-Calendrical Calculations: The Millennium Edition
-</a>, Cambridge University Press (2001).  Other information and
+resource in this area is Nachum Dershowitz and Edward M. Reingold,
+<a href="http://emr.cs.iit.edu/home/reingold/calendar-book/third-edition/">
+Calendrical Calculations: Third Edition
+</a>, Cambridge University Press (2008).  Other information and
 sources are given below.  They sometimes disagree.