Columbia subject headings:
Harvard subject headings:
Agriculture and state--United States--Congresses.
Natural resources--Congresses
Natural resources--Government policy--United States--Congresses.
Natural resources--United States--Congresses.
Produce trade--Congresses
Produce trade--United States--Congresses.
Princeton subject headings:
Agriculture and state--United States--Congresses.
Natural resources--Congresses.
Natural resources--Government policy--United States--Congresses.
Natural resources--United States--Congresses.
Produce trade--Congresses.
Produce trade--United States--Congresses.