@book{26881,
	author = {Langer, William L.},
	title = {An encyclopedia of world history, ancient, medieval, and modern, chronologically arranged.},
	publisher = {Houghton Mifflin},
	year = {1952.},
	address = {Boston},
	edition = {Rev. ed.},
	note = {"Revised with the assistance of Hans W. Gatzke."}
}