Originally published by Unesco, 1992-1998.;Includes bibliographical references.;;v. 1. The dawn of civilivation, earliest time to 700 B.C. -- v. 2. The development of sedentary and nomadic civilizations, 700 B.C. to A.D. 250 -- v. 3. The crossroads of civilizations, A.D. 250 to 750 --