The articles under this heading provide an overview of the field of population. Specific topics directly within the field of demography are reviewed in Fertility; Migration; Mortality; Nuptiality. Methods used for the study of population are described in Census; Life Tables; Sample Surveys; Statistics; Survey Analysis; Vital Statistics. Other material directly relevant to the study of population will be found in Capital, Human; Epidemiology; Fertility Control; Food, article on World Problems; Genetics, article on Demography and Population Genetics; Labor Force; Literacy; Public Health; Social Behavior, Animal, article on The Regulation of Animal Populations. Also relevant are the biographies of Bertillon; Graunt; Lotka; Malthus; Petty; Sundt; StJssmilch; WlCksell; WlLlcox.