Labor (2) Population (2) Physical anthropology (2) Mortality (2) Demography (2) Census (2) Calculus (2) Antropología física (2) Población (2) Censos (2) Demografía (2) Mortalidad (2) Cálculo (2) Trabajo (2) Minors (1) Women (1) Smallpox (1) Registers of births, etc (1) Probabilities (1) Pott's disease (1) Nomads (1) Methodology (1) Measles (1) Mayas (1) Maya language (1) International Standard Book Numbers (1) Families (1) Essay (1) Education (1) Diseases (1)