Columbia subject headings:
Economic history--1971-1990--Periodicals.
Economic history--1990---Periodicals.
Natural resources--Periodicals.
Harvard subject headings:
Economic history--1971-1990--Periodicals
Economic history--1990---Periodicals
Natural resources--Periodicals
Reference works
Princeton subject headings:
Conservation of natural resources--Periodicals.
Natural resources--International cooperation--Periodicals.
Natural resources--Periodicals.
Periodicals.