Columbia subject headings:
United States--Census, 1970--Handbooks, manuals, etc.
United States--Census, 1970.
United States--Statistical services--Handbooks, manuals, etc.
United States. Bureau of the Census.
Harvard subject headings:
Princeton subject headings:
United States--Census, 19th, 1970--Handbooks, manuals, etc.
United States--Census, 19th, 1970.
United States--Statistical services--Handbooks, manuals, etc.
United States. Bureau of the Census