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)
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], 1956)
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], 1954)
Schultz, C. Bertrand (Charles Bertrand), 1908-; Falkenbach, Charles H.; American Museum of Natural History. Frick Laboratories.(New York : [American Museum of Natural History], 1950)