16th census of the U.S.: 1940.
Key to the published and tabulated data for small areas (Preliminary)
APA Citation
United States. Bureau of the Census., United States. Bureau of the Census. Key to the published and tabulated data for small areas. (194). 16th census of the U.S.: 1940: Key to the published and tabulated data for small areas (Preliminary). [Washington: U.S. Govt. Print. Off..
MLA Citation
United States. Bureau of the Census, and United States. Bureau of the Census. Key to the published and tabulated data for small areas. 16th Census of the U.S.: 1940: Key to the Published And Tabulated Data for Small Areas (Preliminary). [Washington: U.S. Govt. Print. Off., 194.
Warning: These citations may not always be complete (especially for serials).