Issue #1 May 01, 1961 Issue #2 Jan 01, 1961 Issue #3 Sep 01, 1961 Issue #4 Issue #5 Jan 01, 1962 Issue #6 Apr 01, 1962 Issue #7 Issue #8 Aug 01, 1962 Issue #9 Oct 01, 1962 Issue #10 Dec 01, 1962 Issue #11 Feb 01, 1963 Issue #12 Apr 01, 1963 Issue #13 Jun 01, 1963 Issue #14 Aug 01, 1963 Issue #15 Oct 01, 1963 Issue #16 Dec 01, 1963 Issue #17 Feb 01, 1962 Issue #18 May 01, 1964 Issue #19 Jul 01, 1964 Issue #20 Oct 01, 1964