Tignor, Robert Worlds together, worlds apart : a history of the world from the beginnings of humankind to the present / Robert Tignor ... [et al.]. - 2nd ed. - New York : W.W. Norton, c2008. - xl, 960 p. : ill., maps. ; 29 cm. ISBN: 9780393925470 LCCN: Subjects--Topical Terms: World history LC Class. No.: D21 / .W94 2008