The city in the world of the future, by Hal Hellman. Hellman, Hal, 1927- City planning. HT166 .H43 309.26 HEC Bibliography: p. 178-181. Discusses the definition of a city and examines how limited resources and a growing population will influence the way cities are planned and built in the future. New York : M. Evans; distributed in association with Lippincott, Philadelphia, [1970]. [1970]. 1970 Text 186 p. eng