Langer, William L. An encyclopedia of world history, ancient, medieval, and modern, chronologically arranged. - Rev. ed. - Boston Houghton Mifflin 1952. - xi, 1243, lxxxix p. maps, geneal. tables. 22 cm. "Revised with the assistance of Hans W. Gatzke." LCCN: 52009589 //r87 Subjects--Topical Terms: History--Outlines, syllabi, etc. LC Class. No.: D21 / .L27 1952 Dewey Class. No.: 902