Issue #20 Aug 15, 1972 Issue #21 Oct 17, 1972 Issue #22 Dec 12, 1972 Issue #23 Feb 27, 1973 Issue #24 Apr 24, 1973 Issue #25 Jun 26, 1973 Issue #26 Aug 21, 1973 Issue #27 Oct 09, 1973 Issue #28 Feb 12, 1974 Issue #29 Apr 09, 1974 Issue #30 Jun 11, 1974 Issue #31 Aug 06, 1974 Issue #32 Oct 03, 1974 Issue #33 Dec 03, 1974 Issue #34 Feb 04, 1975 Issue #35 Apr 01, 1975 Issue #36 Jun 03, 1975 Issue #37 Aug 05, 1975 Issue #38 Oct 07, 1975 Issue #39 Mar 01, 1976