Issue #12 Aug 01, 1972 Issue #13 Oct 03, 1972 Issue #14 Nov 28, 1972 Issue #15 Feb 06, 1973 Issue #16 Apr 03, 1973 Issue #17 Jun 05, 1973 Issue #18 Jul 03, 1973 Issue #19 Jul 31, 1973 Issue #20 Sep 25, 1973 Issue #21 Nov 20, 1973 Issue #22 Jan 29, 1974 Issue #23 Apr 09, 1974 Issue #24 Jun 11, 1974 Issue #25 Jul 09, 1974 Issue #26 Aug 13, 1974 Issue #27 Oct 10, 1974 Issue #28 Dec 10, 1974 Issue #29 Feb 11, 1975 Issue #30 Apr 08, 1975 Issue #31 Jun 10, 1975