Bulgaria.
D002031:Bulgaria; D003148:Communism; D003710:Demography; D019049:Developed Countries; D004467:Economics; D004493:Education; D005060:Europe; D005061:Europe, Eastern; D005843:Geography; D007226:Infant Mortality; D007391:International Cooperation; D008017:Life Expectancy; D009026:Mortality; D011056:Political Systems; D011057:Politics; D011153:Population; D011154:Population Characteristics; D011156:Population Density; D011157:Population Dynamics; D011158:Population Growth; D012067:Religion; D012950:Socialism
Bulgaria--history; Communism; Demographic Factors; Developed Countries; Eastern Europe; Economic Development; Economic Factors; Education; Europe; Geographic Factors; Infant Mortality; International Cooperation; Life Expectancy; Mortality; Political Factors; Political Systems; Population; Population Characteristics; Population Density; Population Dynamics; Population Growth; Population Size; Religion; Socialism