Columbia subject headings:
Agriculture and state--United States--Congresses.
Agriculture--Water-supply--Government policy--United States--Congresses.
Food supply--Government policy--United States--Congresses.
Nutrition policy--United States--Congresses.
Soil conservation--Government policy--United States--Congresses.
Harvard subject headings:
Agriculture and state--United States--Congresses.
Agriculture and state--United States.
Food supply--Government policy--United States
Food supply--Government policy--United States--Congresses.
Nutrition policy--United States--Congresses.
Nutrition policy--United States.
Soil conservation--Government policy--United States--Congresses.
Soil conservation--Government policy.
Water-supply, Agricultural--Government policy--United States--Congresses.
Water-supply, Agricultural--Government policy--United States.
Princeton subject headings:
Agriculture and state--United States--Congresses.
Agriculture--Water-supply--Government policy--United States--Congresses.
Food supply--Government policy--United States--Congresses.
Nutrition policy--United States--Congresses.
Soil conservation--Government policy--United States--Congresses.