Columbia subject headings:
Irrigation--United States--Periodicals.
Reclamation of land--United States--Periodicals.
Water resources development--United States--Periodicals.
Harvard subject headings:
Irrigation--United States--Periodicals.
Reclamation of land--United States--Periodicals.
Water resources development--United States--Periodicals.
Princeton subject headings:
Irrigation--United States--Periodicals.
Reclamation of land--United States--Periodicals.
Water resources development--United States--Periodicals.