http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1940: population: internal migration: 1935 to 1940: economic characteristics of migrants
16th census of the United States: 1940: population: internal migration: 1935 to 1940: economic characteristics of migrants
Population: internal migration: 1935 to 1940: economic characteristics of migrants
At head of title: United States Department of Commerce ... Bureau of the Census ...
Sixteenth census of the United States: 1940: population: internal migration: 1935 to 1940: economic characteristics of migrants