Population. :
Series P-15 /
Sixteenth census of the United States: 1940. no. 1-12.
APA Citation
United States. Bureau of the Census. (194243). Population.: Series P-15. Washington.
MLA Citation
United States. Bureau of the Census. Population.: Series P-15. Washington, 194243.
Warning: These citations may not always be complete (especially for serials).