Demographic catastrophes in Russia.
D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D009026:Mortality; D011057:Politics; D011153:Population; D011157:Population Dynamics; D012106:Research; D012107:Research Design; D012426:Russia; D013223:Statistics as Topic; D014857:Warfare
Data Analysis; Data Quality; Demographic Factors; Demographic Impact; Developed Countries; Eastern Europe; Europe; Excess Mortality; Mortality; Political Factors; Population; Population Dynamics; Research Methodology; Russia; War