Irving Inc.. Gay Times #21, 1974 pg. 15 (Advertisement)
Irving Inc.. Gay Times #20, 1974 pg. 25 (Advertisement)
Irving, Inc.. The Advocate #134, Apr. 10, 1974 pg. 29 (Advertisement)
Vista Theatre. Advocate 139 IS June 5, 1974 Jun. 5, 1974: The Advocate pg. 30 (Advertisement)
John Marvin. "Kenneth Sprague AKA Dakota" In Touch Vol. 2 No. 2 Nov. 1974 pg. 28 (Essay)
Irving Inc.. In Touch Vol. 2 No. 2 Nov. 1974 pg. 74 (Advertisement)
Irving Inc.. In Touch Vol. 2 No. 3 Dec. 1974 pg. 8 (Advertisement)
Siebenand, Paul. The Beginnings of Gay Cinema in Los Angeles: The Industry and the Audience. Los Angles, CA: USC, 1975 pg. 181,238,246,251,273
Irving Inc.. Gay Times #28, 1975 pg. 23 (Advertisement)
Irving Inc.. Gay Times #27, 1975 pg. 23 (Advertisement)
Irving Inc.. Gay Times #26, 1975 pg. 23 (Advertisement)
Irving Inc.. In Touch No. 17 Apr.-May 1975 pg. 83 (Advertisement)