Columbia subject headings:
Harvard subject headings:
Soil conservation--Abstracts--Periodicals.
Soil conservation--Bibliography--Periodicals.
Soil conservation--Research--Periodicals.
Water conservation--Abstracts--Periodicals.
Water conservation--Bibliography--Periodicals.
Water conservation--Research--Periodicals.
Water-supply--Abstracts--Periodicals.
Water-supply--Bibliography--Periodicals.
Princeton subject headings:
Soil conservation--Abstracts--Periodicals.
Soil conservation--Bibliography--Periodicals.
Soil conservation--Research--Periodicals.
Water conservation--Abstracts--Periodicals.
Water conservation--Research--Periodicals.
Water--Conservation--Bibliography--Periodicals.
Water-supply--Abstracts--Periodicals.
Water-supply--Bibliography--Periodicals.