Issue #20 Mar 24, 1970 Issue #21 Apr 17, 1970 Issue #22 Jun 27, 1972 Issue #23 Aug 22, 1972 Issue #24 Oct 24, 1972 Issue #25 Dec 19, 1972 Issue #26 Feb 27, 1973 Issue #27 Apr 24, 1973 Issue #28 Jun 26, 1973 Issue #29 Aug 21, 1973 Issue #30 Oct 16, 1973 Issue #31 Dec 04, 1973 Issue #32 Feb 12, 1974 Issue #33 Apr 16, 1974 Issue #34 Jun 18, 1974 Issue #35 Aug 20, 1974 Issue #36 Oct 17, 1974 Issue #37 Dec 17, 1974 Issue #38 Feb 18, 1975 Issue #39 Apr 15, 1975