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authorPaul Eggert <[email protected]>1997-12-16 19:12:36 +0000
committerPaul Eggert <[email protected]>1997-12-16 19:12:36 +0000
commita96a5fca077aae6ccb85e1a6cbb177053692d6ca (patch)
tree32eaf8b0dcc7f46fafff4ca005a46f2391d44892 /lisp/calendar/lunar.el
parent2b20743d79533eb9a339f2e4026a6b10185c0fec (diff)
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 67a472ebaa..6bd685ec7b 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 <[email protected]>
;; 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