Abstract This collection contains notes, photographs, articles, manuscripts, maps, published papers, clippings, correspondence, sound recordings, and other material from cultural anthropologist Ralph C. Michelsen. Materials in the collection mostly pertain to Michelsen's anthropological research on numerous indigenous tribes in North and Central America, including the PaiPai and Kiliwa of Baja California, various Luiseño groups in southern California, the Mohave and Cocopah, the Seri of Mexico, and...