See the Emacs project page
@url{http://savannah.gnu.org/projects/emacs/} for details.
-For more information on how to contribute, see the @file{etc/CONTRIBUTE}
+For more information on how to contribute, see the
+@ifset WWW_GNU_ORG
+@ifhtml
+@url{http://gnu.org/software/emacs/CONTRIBUTE, etc/CONTRIBUTE}
+@end ifhtml
+@ifnothtml
+@file{etc/CONTRIBUTE}
+@end ifnothtml
+@end ifset
+@ifclear WWW_GNU_ORG
+@file{etc/CONTRIBUTE}
+@end ifclear
file in the Emacs distribution.
@node Service