Columbia subject headings:
Agriculture--Economic aspects--United States--Periodicals.
Agriculture--Economic aspects.
Produce trade--Research--United States--Periodicals.
Produce trade--United States--Periodicals.
Harvard subject headings:
Agriculture--Economic aspects--Periodicals
Agriculture--Economic aspects--Research--United States--Periodicals.
Agriculture--Economic aspects--United States--Periodicals
Agriculture--Economic aspects--United States--Research--United States--Periodicals.
Produce trade--Periodicals
Produce trade--Research--United States--Periodicals.
Produce trade--United States--Periodicals
Produce trade--United States--Research--United States--Periodicals.
Princeton subject headings:
Agriculture--Economic aspects--Periodicals.
Agriculture--Economic aspects--Research--United States--Periodicals.
Agriculture--Economic aspects--United States--Periodicals.
Periodicals.
Produce trade--Periodicals.
Produce trade--Research--United States--Periodicals.
Produce trade--United States--Periodicals.