Issue #603 Jul 04, 1989 Issue #604 Jul 25, 1989 Issue #605 Aug 08, 1989 Issue #606 Aug 22, 1989 Issue #607 Sep 05, 1989 Issue #608 Sep 26, 1989 Issue #609 Oct 26, 1989 Issue #610 Nov 23, 1989 Issue #611 Dec 21, 1989 Issue #612 Feb 06, 1990 Issue #613 Mar 06, 1990 Issue #614 Apr 03, 1990 Issue #615 Apr 26, 1990 Issue #616 May 10, 1990 Issue #617 May 22, 1990 Issue #618 Jun 07, 1990 Issue #619 Jun 26, 1990 Issue #620 Jul 12, 1990 Issue #621 Aug 02, 1990 Issue #622 Aug 30, 1990