Issue #258 May 22, 1979 Issue #259 Jun 19, 1979 Issue #260 Jul 17, 1979 Issue #261 Aug 07, 1979 Issue #262 Sep 13, 1979 Issue #263 Oct 09, 1979 Issue #264 Nov 06, 1979 Issue #265 Dec 06, 1979 Issue #266 Jan 08, 1980 Issue #267 Feb 11, 1980 Issue #268 Mar 11, 1980 Issue #269 Apr 10, 1980 Issue #270 May 08, 1980 Issue #271 Jun 12, 1980 Issue #272 Oct 01, 1980 Issue #273 Nov 01, 1980 Issue #274 Dec 01, 1980 Issue #275 Jan 01, 1981 Issue #276 Feb 01, 1981 Issue #277 Mar 01, 1981