Issue #50 May 01, 1975 Issue #51 Apr 01, 1975 Issue #52 Jun 03, 1975 Issue #53 Jul 01, 1975 Issue #54 Aug 19, 1975 Issue #55 Oct 21, 1975 Issue #56 Mar 01, 1976 Issue #57 Feb 10, 1976 Issue #58 Jul 01, 1976 Issue #59 Jun 08, 1976 Issue #60 Jul 13, 1976 Issue #61 Nov 01, 1976 Issue #62 Oct 12, 1976 Issue #63 Dec 07, 1976 Issue #64 Feb 01, 1977 Issue #65 Apr 05, 1977 Issue #66 May 31, 1977 Issue #67 Aug 03, 1977 Issue #68 Sep 06, 1977 Issue #69 Oct 04, 1977