Columbia subject headings:
Economic assistance--Periodicals.
OPEC Fund for International Development--Periodicals.
Organization of Petroleum Exporting Countries--Periodicals.
Harvard subject headings:
Economic assistance--Periodicals
OPEC Fund for International Development--Periodicals.
Organization of Petroleum Exporting Countries--Periodicals.
Princeton subject headings:
Economic assistance--Periodicals.
OPEC Fund for International Development--Periodicals.
Organization of Petroleum Exporting Countries--Periodicals.
Periodicals.