Issue #1 Dec 14, 1972 Issue #2 Feb 15, 1973 Issue #3 Mar 15, 1973 Issue #4 Apr 17, 1973 Issue #5 Jun 19, 1973 Issue #6 Jul 19, 1973 Issue #7 Aug 16, 1973 Issue #8 Sep 11, 1973 Issue #9 Oct 18, 1973 Issue #10 Nov 22, 1973 Issue #11 Dec 20, 1973 Issue #12 Feb 19, 1974 Issue #13 Apr 16, 1974 Issue #14 Jun 18, 1974 Issue #15 Aug 20, 1974 Issue #16 Oct 22, 1974 Issue #17 Dec 19, 1974 Issue #18 May 01, 1975 Issue #19 Apr 22, 1975 Issue #20 Jun 24, 1975