Issue #1 Aug 10, 1972 Issue #2 Oct 12, 1972 Issue #3 Dec 07, 1972 Issue #4 Feb 06, 1973 Issue #5 Apr 05, 1973 Issue #6 Jun 07, 1973 Issue #7 Aug 07, 1973 Issue #8 Oct 04, 1973 Issue #9 Dec 06, 1973 Issue #10 Feb 07, 1974 Issue #11 Apr 02, 1974 Issue #12 Jun 04, 1974 Issue #13 Aug 06, 1974 Issue #14 Oct 08, 1974 Issue #15 Dec 05, 1974 Issue #16 Feb 04, 1975 Issue #17 Apr 01, 1975 Issue #18 Jun 03, 1975 Issue #19 Jul 10, 1975 Issue #20 Sep 09, 1975