Issue #42 Feb 01, 1977 Issue #43 Apr 01, 1977 Issue #44 Jun 30, 1977 Issue #45 May 05, 1977 Issue #46 Aug 01, 1977 Issue #47 Sep 01, 1977 Issue #48 Aug 04, 1977 Issue #49 Dec 31, 1977 Issue #50 Feb 01, 1978 Issue #51 Apr 01, 1978 Issue #52 Jun 30, 1978 Issue #53 May 11, 1978 Issue #54 Aug 31, 1978 Issue #55 Sep 01, 1978 Issue #56 Oct 01, 1978 Issue #57 Dec 31, 1978 Issue #58 Feb 28, 1979 Issue #59 Feb 01, 1979 Issue #60 Jun 30, 1979 Issue #61 May 10, 1979