Issue #13 Jan 13, 1976 Issue #14 Feb 10, 1976 Issue #15 Mar 09, 1976 Issue #16 Apr 13, 1976 Issue #17 May 11, 1976 Issue #18 Jun 08, 1976 Issue #19 Jul 13, 1976 Issue #20 Sep 14, 1976 Issue #21 Feb 28, 1977 Issue #22 Jan 11, 1977 Issue #23 Mar 08, 1977 Issue #24 May 10, 1977 Issue #25 Jul 12, 1977 Issue #26 Sep 13, 1977 Issue #27 Nov 08, 1977 Issue #28 Jan 10, 1978 Issue #29 Mar 14, 1978 Issue #30 May 09, 1978 Issue #31 Jul 11, 1978 Issue #32 Sep 12, 1978