Concise report on the world population situation in 1991 : with a special emphasis on age structure /
United Nations.Department of International Economic and Social Affairs.
New York : United Nations,
1991.
"ST/ESA/SER.A/124."
"United Nations publication sales no. E.91.XIII.17"--T.p. verso.
Includes bibliographical references.
Population
Age distribution (Demography)