1. The Revival of Population Growth in Nonmetropolitan America;Beale,1975
2. Beale, C. L., and G. V. Fuguitt 1975 “Population trends of nonmetropolitan cities and villages in subregions of the United States.” Center for Demography and Ecology Working Paper 75–30.
3. Forstall, R. L. 1975 “Trends in metropolitan and nonmetropolitan population growth since 1970.” Paper presented at the NICHD Conference on Population Distribution, Belmont (Baltimore, Maryland).
4. Social and Economic Characteristics of the Population in Metro and Nonmetro Counties, 1970;Hines,1975
5. The Methods and Materials of Demography.;Shryock,1971