Columbia subject headings:
Earthworks (Archaeology)--Thailand.
Moats--Thailand.
Thailand--Antiquities.
Harvard subject headings:
Archaeological surveying--Thailand.
Earthworks (Archaeology)--Thailand, Northeastern.
Earthworks (Archaeology)--Thailand.
Moats--Thailand, Northeastern.
Moats--Thailand.
Thailand, Northeastern--Antiquities.
Thailand--Antiquities.
Princeton subject headings:
Earthworks (Archaeology)--Thailand.
Moats--Thailand.
Thailand--Antiquities.