Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Mexico--Guanajuato (State)--Antiquities.
Guanajuato (Mexico : State)--Antiquities.
Indians of Mexico--Mexico--Guanajuato (State)--Antiquities.
Pénjamo (Mexico)--Antiquities.
Princeton subject headings:
Guanajuato (Mexico : State)--Antiquities.
Indians of Mexico--Mexico--Guanajuato (State)--Antiquities.
Plazuelas Site (Pénjamo, Mexico)