Issue #613 Oct 01, 1990 Issue #614 Oct 01, 1990 Issue #615 Nov 01, 1990 Issue #616 Nov 01, 1990 Issue #617 Nov 07, 1990 Issue #618 Nov 14, 1990 Issue #619 Nov 14, 1990 Issue #620 May 14, 1991 Issue #621 Jun 04, 1991 Issue #622 Jun 25, 1991 Issue #623 Jul 02, 1991 Issue #624 Jul 09, 1991 Issue #625 Jul 23, 1991 Issue #626 Jul 23, 1991 Issue #627 Oct 15, 1991 Issue #628 Oct 22, 1991 Issue #629 Oct 29, 1991 Issue #630 Nov 05, 1991 Issue #631 Feb 25, 1992 Issue #632 Mar 24, 1992