Issue #421 Jan 27, 1972 Issue #422 Feb 29, 1972 Issue #423 Mar 30, 1972 Issue #424 Apr 27, 1972 Issue #425 May 30, 1972 Issue #426 Jun 29, 1972 Issue #427 Jul 27, 1972 Issue #428 Aug 31, 1972 Issue #429 Sep 28, 1972 Issue #430 Oct 26, 1972 Issue #431 Nov 30, 1972 Issue #432 Dec 28, 1972 Issue #433 Jan 30, 1973 Issue #434 Feb 27, 1973 Issue #435 Jun 01, 1973 Issue #436 Aug 01, 1973 Issue #437 Oct 01, 1973 Issue #438 Mar 01, 1974 Issue #439 Dec 01, 1973 Issue #440 Jan 29, 1974