Hill, C. P. The United States since the First World War / C. P. Hill; maps by E. G. Morton. - London : Allen & Unwin, 1967. - 144 p. : front., illus. (incl. ports.) maps, table. ; 22 cm. - 20th century histories, no. 2 . Bibliography: p. 142-143. LCCN: 67075413 Nat. Bib. No.: B67-3233 Subjects--Geographic Terms: United States--History--20th century. LC Class. No.: E741 / .H55 Dewey Class. No.: 973.9 / HIU 1967