John Day Collection on Robert (Bobby) Penn, Richardson Collection, Archives and Special Collections, The University of South Dakota.
Robert Penn Retrospective. Organized by the University Art Galleries, University of South Dakota: Vermillion, SD, June 1993.
(Chilson Collection ND237.P46A41993)
Vision Quest: Men, Women & Sacred Sites of the Sioux Nation (An Interactive CD-Rom Featuring the Photographs of Don Doll, S.J.)
(Computer Software & Files / 1st floor, E99.D1 D652 1996)