Columbia subject headings:
Business forecasting--Periodicals.
Commercial products--Periodicals.
Raw materials--Periodicals.
Harvard subject headings:
Economic forecasting--Periodicals.
International economic relations--Periodicals
Raw materials--Periodicals.
Raw materials--Prices--Periodicals.
Princeton subject headings:
Economic forecasting--Periodicals.
International economic relations--Periodicals.
Periodicals.
Raw materials--Periodicals.
Raw materials--Prices--Periodicals.