http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Recent trends in fertility in industrialized countries
Department of Economic and Social Affairs.
"The Population Branch of the Bureau of Social Affairs has undertaken the present study."
"[United Nations. Document] ST/SOA/Ser.A.27."
"United Nations publication. Sales number: 1957.XIII.2."
Population studies (New York, N.Y.) ; no. 27