U.S.S.R.
D000383:Agriculture; D003132:Commerce; D003148:Communism; D003710:Demography; D019049:Developed Countries; D004467:Economics; D005006:Ethnicity; D005843:Geography; D008017:Life Expectancy; D008136:Longevity; D009026:Mortality; D011056:Political Systems; D011057:Politics; D011153:Population; D011154:Population Characteristics; D011156:Population Density; D011157:Population Dynamics; D011158:Population Growth; D012939:Social Planning; D014586:USSR