The evolution of man; a series of lectures delivered before the Yale chapter of the Sigma xi during the academic year 1921-1922
Baitsell, George Alfred, 1885-1971; Lull, Richard Swann, 1867-; Ferris, H. B. (Harry Burr), 1865-1940; Parker, George Howard, 1864-1955; Angell, James Rowland, 1869-1949; Keller, Albert Galloway, 1874-1956; Conklin, Edwin Grant, 1863-1952