Strayer, Robert W. Why did the Soviet Union collapse? : Understanding historical change / Robert Strayer. - Armonk, N.Y. : M.E. Sharpe, 1998. - xi, 219 p. : 1 map ; 24 cm. Includes bibliographical references and index. ISBN: 076560003X (alk. paper) 0765600048 (pbk. : alk. paper) Subjects--Geographic Terms: Soviet Union--History--1985-1991.Soviet Union--History--Philosophy.