Columbia subject headings:
Harvard subject headings:
Agricultural laborers--Periodicals.
Agriculture--Economic aspects--United States--Periodicals
Princeton subject headings:
Agricultural laborers--Labor unions--United States--Periodicals.
Agricultural laborers--Political activity--United States--Periodicals.
Agriculture--Economic aspects--United States--Periodicals.
Food, Tobacco, Agricultural, and Allied Workers Union of America--Periodicals.
Periodicals.