Osborn, Henry Fairfield, 1857-1935.; Matthew, William Diller, 1871-1930.; Granger, Walter, 1872-1941.; National Academy of Sciences (U.S.)(New York : Published by order of the Trustees, American Museum of Natural History, 1907)
Schultz, C. Bertrand (Charles Bertrand), 1908-; Falkenbach, Charles H.; American Museum of Natural History. Frick Laboratories.; University of Nebraska State Museum.(New York : [American Museum of Natural History], 1968)