Published online by Cambridge University Press: 27 January 2017
This study was made possible by support from the National Science Foundation. We would like to acknowledge the aid of our able assistants, Richard H. Rowland and Ralph S. Clem, in the preparation of this paper, as well as the use of computer services at Western Data Processing Center, University of California at Los Angeles.
1 Tsentral'noe Statisticheskoe Upravlenie, Itogi vsesoiuznoi perepisi naseleniia 1959 goda (Moscow, 1962). 2In the 1959 census for the RSFSR data on the population of cities are given only for cities of 15,000 or more, although for the other republics there are data for cities of 10,000 or more. Because the criteria for urban population have varied from census to census, it was necessary to construct a consistent series; our definition of “urban” for each census year comprises cities of 15,000 or more.