Serial. Printed Ephemera Collection has: 1978:July 1, 1978:Aug.22, 1978:Oct.17, 1979:July 16, 1979:Aug.23, 1980:July 21, 1980:Aug.22, 1981:Jan.23, 1981:July 16, 1981:Aug.23, 1981:Oct.16, 1982:Jan.25, 1982:July 20. Some issues lack chronological designation and are designated by release date only.