Urban Development in East-central Europe: Poland, Czechoslovakia, and Hungary. By E. A. Gutkind. International History of City Development, vol. 7. With contributions by Wojcicch Kalinowski, members of the Union of Architects of the Czechoslovak Socialist Republic, and Imre Pcrenyi. Edited by Gabrielc Gutkind. New York: Free Press. London: Collier-Macmillan Ltd., 1972. xviii, 475 pp. 339 illus. $25.00. - Urban Development in Eastern Europe: Bulgaria, Romania, and the U.S.S.R. By E. A. Gutkind. International History of City Development, vol. 8. With contributions by Peter Tashcv and members of the Central Research and Design Institute for Building, Architecture, and Planning (ISCAS) of the State Committee for Building, Architecture, and Planning (CSCAS), Rumania. Edited by Gabriele Gutkind. New York: Free Press. London: Collier-Macmillan Ltd., 1972. xviii. 457 pp. 250 illus. $19.95.