Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Guatemala--Congresses.
Guatemala--Antiquities--Congresses.
Indians of Central America--Guatemala--Antiquities--Congresses.
Mayas--Antiquities--Congresses
Princeton subject headings:
Excavations (Archaeology)--Guatemala--Congresses.
Guatemala--Antiquities--Congresses.
Mayas--Antiquities--Congresses.