Engberg, Robert M. 1906- The dawn of civilization and life in the ancient East, [electronic resource] / by Robert Martin Engberg. Fay-Cooper Cole, editor.. — Chicago, : University of knowledge, incorporated, [c1937]. — xvi, 17-384 p. incl. front., illus. (incl. maps) 24 cm. — (University of knowledge; [v.3]).