An encyclopedia of world history, ancient, medieval and modern, chronologically arranged / compiled and edited by William L. Langer - Rev. ed. - Boston, Mass. : Houghton Mifflin Co., [1948] - xlvi, 1270 pages : maps, geneal. tables. ; 22 cm. 'Revised with the assistance of Geoffrey Bruun.' ISBN: Subjects--Topical Terms: History--Outlines, syllabi, etc.