Issue #12 Sep 18, 1987 Issue #13 Nov 18, 1987 Issue #14 Feb 18, 1988 Issue #15 May 18, 1988 Issue #16 Jul 18, 1988 Issue #17 Sep 17, 1988 Issue #18 Nov 18, 1988 Issue #19 Dec 13, 1988 Issue #20 Mar 18, 1989 Issue #21 May 18, 1989 Issue #22 Aug 18, 1989 Issue #23 Oct 18, 1989 Issue #24 Mar 17, 1990 Issue #25 May 18, 1990 Issue #26 Jul 18, 1990 Issue #27 Oct 18, 1990 Issue #28 Dec 13, 1990 Issue #29 Jan 18, 1991 Issue #30 Feb 18, 1991 Issue #31 Mar 18, 1991