Among the problems of planning and urban development, more and more importance is acquired by problems relating to the development of large cities and the formation of an expedient system of settlement. In our country the growth of the urban population stems from the intensive development of industry and the planned program for drawing to the cities additional manpower from agricultural regions where labor productivity is rising rapidly as a result of mechanization. While not so very long ago only Moscow and Leningrad had a population in excess of one million, today there are eleven such cities. The populations of Volgograd, Cheliabinsk, Kazan', Perm', Omsk, Odessa, Donetsk, Dnepropetrovsk, Erevan, Tbilisi, and Alma-Ata are nearing the one-million mark.