--- zone1970.tab.orig	2019-06-22 19:39:01 UTC
+++ zone1970.tab
@@ -9,7 +9,8 @@
 # UTF-8 encoding.  The columns of the table are as follows:
 #
 # 1.  The countries that overlap the timezone, as a comma-separated list
-#     of ISO 3166 2-character country codes.  See the file 'iso3166.tab'.
+#     of ISO 3166 2-character country codes.
+#     See the file '/usr/share/misc/iso3166'.
 # 2.  Latitude and longitude of the timezone's principal location
 #     in ISO 6709 sign-degrees-minutes-seconds format,
 #     either ±DDMM±DDDMM or ±DDMMSS±DDDMMSS,