1940 Census Enumeration District Maps - Illinois - Richland County - Olney - ED 80-12, ED 80-13, ED 80-14, ED 80-15, ED 80-16

Chicago citation style
Department of Commerce. Bureau of the Census. Office of the Associate Director for Decennial Census. Geography Division. (1/1987 - 7/15/2011). 1940 Census Enumeration District Maps - Illinois - Richland County - Olney - ED 80-12, ED 80-13, ED 80-14, ED 80-15, ED 80-16. 1880-01-01/1990-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5831697. (Accessed September 24, 2018.)
APA citation style
Department of Commerce. Bureau of the Census. Office of the Associate Director for Decennial Census. Geography Division. (1/1987 - 7/15/2011), (1880-01-01/1990-12-31) 1940 Census Enumeration District Maps - Illinois - Richland County - Olney - ED 80-12, ED 80-13, ED 80-14, ED 80-15, ED 80-16. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5831697
MLA citation style
Department of Commerce. Bureau of the Census. Office of the Associate Director for Decennial Census. Geography Division. (1/1987 - 7/15/2011). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/5831697>.
Note: These citations are programmatically generated and may be incomplete.