Mary Swift. Contact sheet of Robert Indiana's "Star of Hope" studio on Vinelhaven, Maine, 1981. Mary Swift papers, 1973-2004. Archives of American Art, Smithsonian Institution.
Mary Swift. Photograph of Robert Indiana with Decade Autoportrait 1969 (72 in.), not before 1972. Mary Swift papers, 1973-2004. Archives of American Art, Smithsonian Institution.
Robert Indiana and Mary Swift. Interview with Robert Indiana, 1981 August 25. Mary Swift papers, 1973-2004. Archives of American Art, Smithsonian Institution.