Columbia subject headings:
Harvard subject headings:
Coyoacán (Mexico City, Mexico)--Antiquities.
Coyoacán Site (Mexico)
Indians of Mexico--Mexico--Mexico, Valley of--Antiquities
Mexico City (Mexico)--Antiquities
Mexico, Valley of (Mexico)--Antiquities.
Paleobotany--Mexico--Mexico, Valley of.
Plant remains (Archaeology)--Mexico--Mexico, Valley of.
Tlaltengo (Mexico)--Antiquities.
Tlaltengo Site (Mexico)
Princeton subject headings:
Archaeological dating--Mexico--Mexico City.
Mexico City (Mexico)--Antiquities.
Paleobotany--Mexico--Mexico City.
Plant remains (Archaeology)--Mexico--Mexico City.