Issue #52 Issue #53 Jan 24, 1977 Issue #54 Apr 26, 1977 Issue #55 Jun 28, 1977 Issue #56 Jul 26, 1977 Issue #57 Oct 25, 1977 Issue #58 Issue #59 Apr 25, 1978 Issue #60 Sep 01, 1978 Issue #61 Issue #62 Oct 24, 1978 Issue #63 Jan 23, 1979 Issue #64 Apr 24, 1979 Issue #65 Jul 17, 1979 Issue #66 Aug 14, 1979 Issue #67 Nov 22, 1979 Issue #68 Issue #69 May 13, 1980 Issue #70 Jul 01, 1969 Issue #71 Nov 18, 1980