Columbia subject headings:
Harvard subject headings:
Middle West--Economic conditions--Periodicals.
Minnesota--Economic conditions--Periodicals.
Prices--United States--Periodicals.
United States--Economic conditions--Periodicals.
Princeton subject headings:
Middle West--Economic conditions--Periodicals.
Minnesota--Economic conditions--Periodicals.
Periodicals.
Prices--United States--Periodicals.
United States--Economic conditions--Periodicals.