1940 Census Enumeration District Descriptions - Maryland - Baltimore City County - ED 4-648, ED 4-649, ED 4-650A, ED 4-650B

Chicago citation style
Department of Commerce. Bureau of the Census. Office of the Assistant Director for Operations. Geography Division. (3/13/1947 - 1968). 1940 Census Enumeration District Descriptions - Maryland - Baltimore City County - ED 4-648, ED 4-649, ED 4-650A, ED 4-650B. 1850-01-01/1950-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5866134. (Accessed October 16, 2018.)
APA citation style
Department of Commerce. Bureau of the Census. Office of the Assistant Director for Operations. Geography Division. (3/13/1947 - 1968), (1850-01-01/1950-12-31) 1940 Census Enumeration District Descriptions - Maryland - Baltimore City County - ED 4-648, ED 4-649, ED 4-650A, ED 4-650B. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5866134
MLA citation style
Department of Commerce. Bureau of the Census. Office of the Assistant Director for Operations. Geography Division. (3/13/1947 - 1968). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/5866134>.
Note: These citations are programmatically generated and may be incomplete.