Columbia subject headings:
Agriculture--Economic aspects--United States--Statistical services--Handbooks, manuals, etc.
Agriculture--United States--Statistical services--Handbooks, manuals, etc.
United States. Bureau of the Census--Handbooks, manuals, etc.
Harvard subject headings:
Agriculture--Economic aspects--United States--Statistical services--Handbooks, manuals, etc.
Agriculture--United States--Statistical services--Handbooks, manuals, etc.
United States. Bureau of the Census--Handbooks, manuals, etc.
Princeton subject headings: