Columbia subject headings:
Harvard subject headings:
Agriculture and state--Periodicals.
Agriculture--Economic aspects--Periodicals
Agriculture--International cooperation--Periodicals.
Organisation for Economic Co-operation and Development--Periodicals.
Princeton subject headings:
Agriculture and state--Periodicals.
Agriculture--Economic aspects--Periodicals.
Agriculture--International cooperation--Periodicals.
Organisation for Economic Co-operation and Development.
Periodicals.