Nichols, John T. (John Treadwell), 1883-1958.; American Museum Congo Expedition (1909-1915)(New York : Published by order of the Trustees, American Museum of Natural History, 1918)
Nichols, John T. (John Treadwell), 1883-1958.; Smith, Harlan Ingersoll, 1872-1940.(New York : Published by order of the Trustees, American Museum of Natural History, 1916)