Demographic aspects of changes in the Soviet pension system

Autor: Keyfitz, Nathan, Scherbov, Sergei, Lutz, Wolfgang, 1956-, Sergei Scherbov, Nathan Keyfitz, Wolfgang Lutz ... [et al.]
Rok: 1990

Applied mathematical demography

Autor: Keyfitz, Nathan, Nathan Keyfitz
Rok: 1985

Applied mathematical demography

Autor: Keyfitz, Nathan, Nathan Keyfitz
Rok: 1977

Causes of death : life tables for national populations

Autor: Preston, Samuel H., 1943-, Schoen, Robert, Keyfitz, Nathan, 1913-2010, Samuel H. Preston, Nathan Keyfitz, Robert Schoen
Rok: 1972