Columbia subject headings:
Irrigation--Economic aspects--Thailand--Ranod.
Irrigation--Social aspects--Thailand--Ranod.
Ranod (Thailand)--Economic conditions.
Ranod (Thailand)--Social conditions.
Harvard subject headings:
Irrigation--Economic aspects--Thailand--Ranod.
Irrigation--Social aspects--Thailand--Ranod.
Ranod (Thailand)--Economic conditions.
Ranod (Thailand)--Social conditions.
Princeton subject headings: