Issue #1 Sep 29, 1975 Issue #2 Oct 28, 1975 Issue #3 Nov 28, 1975 Issue #4 Nov 30, 1976 Issue #5 Oct 31, 1977 Issue #6 Jul 28, 1978 Issue #7 Aug 28, 1978 Issue #8 Aug 29, 1979 Issue #9 Sep 28, 1979 Issue #10 Aug 28, 1980 Issue #11 Sep 29, 1980 Issue #12 Nov 28, 1981 Issue #13 Dec 19, 1981 Issue #14 Nov 27, 1982 Issue #15 Dec 17, 1982 Issue #16 Nov 30, 1983 Issue #17 Dec 17, 1983 Issue #18 Jan 30, 1985 Issue #19 Feb 28, 1985 Issue #20 Oct 30, 1985