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authorPaul Eggert <eggert@twinsun.com>1997-12-16 19:12:36 +0000
committerPaul Eggert <eggert@twinsun.com>1997-12-16 19:12:36 +0000
commit12d248c48d9be8f6b0aaa1dd0f36909d33cb9893 (patch)
tree434bc1106980873d650c7ef74c5a3b1ca5061b1b /lisp/calendar/lunar.el
parent3b0988feb74fe3ff95525bbb7363d63db69fe9b5 (diff)
downloademacs-12d248c48d9be8f6b0aaa1dd0f36909d33cb9893.tar.gz
Add reference to new Calendrical Calculations book.
Diffstat (limited to 'lisp/calendar/lunar.el')
-rw-r--r--lisp/calendar/lunar.el6
1 files changed, 5 insertions, 1 deletions
diff --git a/lisp/calendar/lunar.el b/lisp/calendar/lunar.el
index 67a472ebaab..6bd685ec7b0 100644
--- a/lisp/calendar/lunar.el
+++ b/lisp/calendar/lunar.el
@@ -1,6 +1,6 @@
;;; lunar.el --- calendar functions for phases of the moon.
-;; Copyright (C) 1992, 1993, 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1992, 1993, 1995, 1997 Free Software Foundation, Inc.
;; Author: Edward M. Reingold <reingold@cs.uiuc.edu>
;; Keywords: calendar
@@ -37,6 +37,10 @@
;; The author would be delighted to have an astronomically more sophisticated
;; person rewrite the code for the lunar calculations in this file!
+;; Technical details of all the calendrical calculations can be found in
+;; ``Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold,
+;; Cambridge University Press (1997).
+
;; Comments, corrections, and improvements should be sent to
;; Edward M. Reingold Department of Computer Science
;; (217) 333-6733 University of Illinois at Urbana-Champaign