--- 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,
-
-Calendrical Calculations: The Millennium Edition
-, Cambridge University Press (2001). Other information and
+resource in this area is Nachum Dershowitz and Edward M. Reingold,
+
+Calendrical Calculations: Third Edition
+, Cambridge University Press (2008). Other information and
sources are given below. They sometimes disagree.