Issue #408 Dec 31, 1970 Issue #409 Jan 28, 1971 Issue #410 Feb 28, 1971 Issue #411 Mar 30, 1971 Issue #412 Apr 29, 1971 Issue #413 May 27, 1971 Issue #414 Jun 29, 1971 Issue #415 Jul 29, 1971 Issue #416 Aug 31, 1971 Issue #417 Sep 30, 1971 Issue #418 Oct 28, 1971 Issue #419 Nov 30, 1971 Issue #420 Dec 30, 1971 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