Issue #273 Apr 11, 1978 Issue #274 May 09, 1978 Issue #275 Jun 20, 1978 Issue #276 Jul 18, 1978 Issue #277 Aug 15, 1978 Issue #278 Sep 12, 1978 Issue #279 Oct 10, 1978 Issue #280 Nov 07, 1978 Issue #281 Dec 05, 1978 Issue #282 Jan 09, 1979 Issue #283 Feb 06, 1979 Issue #284 Mar 13, 1979 Issue #285 Apr 10, 1979 Issue #286 May 08, 1979 Issue #287 Jun 19, 1979 Issue #288 Jul 10, 1979 Issue #289 Aug 14, 1979 Issue #290 Sep 11, 1979 Issue #291 Oct 09, 1979 Issue #292 Nov 13, 1979