Contemporary urbanization and an optimal size for Soviet cities.
D003710:Demography; D019049:Developed Countries; D004467:Economics; D005843:Geography; D011153:Population; D011156:Population Density; D012959:Socioeconomic Factors; D014586:USSR; D014505:Urban Population; D014507:Urbanization
Developed Countries; Economic Factors; Geographic Factors; Population; Population Density; Socioeconomic Factors; Spatial Distribution; Urban Spatial Distribution; Urbanization; Ussr