1970 census of population and housing.
Census tracts.

APA Citation

United States. Bureau of the Census. (19711972). 1970 census of population and housing. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

MLA Citation

United States. Bureau of the Census. 1970 Census of Population And Housing. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 19711972.

Warning: These citations may not always be complete (especially for serials).