Columbia subject headings:
Agriculture--Economic aspects--United States.
National Farmers' Holiday Association (U.S.)
United States--Politics and government--1933-1945.
Harvard subject headings:
Agriculture--Economic aspects--United States
National Farmers' Holiday Association (U.S.)
United States--Politics and government--1933-1945.
Princeton subject headings:
Agriculture--Economic aspects--United States.
National Farmers' Holiday Association (U.S.)
United States--Politics and government--1933-1945.