Janet Gaynor. Photoplay, 1926 Hartsook Studio :: Janet Gaynor. Photoplay magazine, October 1926. | src internet archive
Kathleen Clifford, late 1910s Hartsook Photo Studio (SF-LA) :: Studio portrait of Kathleen Clifford, late 1910s. |src eBay
“The Twisted Thread” Hartsook Photo Studio :: Kathleen Clifford, “The Twisted Thread”, ca. 1920. | src eBay
Kathleen Clifford, Feb. 1920 Hartsook Photo Studio :: Actress Kathleen Clifford. Published in Motion Picture Classic, February 1920 issue. | src internet archive
Kathleen Clifford, ca. 1920 Hartsook Photo Studio:: Kathleen Clifford, “The Twisted Thread”, ca. 1920. | src eBay
Olive Borden, 1926 Hartsook Photo Studio :: Olive Borden. Photoplay magazine, October 1926 issue. | src archive.org