Issue #1 Jun 27, 1977 Issue #2 Dec 15, 1977 Issue #3 Mar 14, 1978 Issue #4 May 16, 1978 Issue #5 Sep 11, 1978 Issue #6 Sep 26, 1978 Issue #7 Issue #8 Oct 17, 1978 Issue #9 Nov 07, 1978 Issue #10 Feb 01, 1979 Issue #11 Apr 01, 1979 Issue #12 Jul 01, 1979 Issue #13 Oct 09, 1979 Issue #14 Oct 09, 1979 Issue #15 Issue #16 May 20, 1980 Issue #17 Jul 22, 1980 Issue #18 Jun 11, 1981 Issue #19 Jun 16, 1981 Issue #20 Jun 23, 1981