Columbia subject headings:
Ethnobotany--Mexico--Tehuacán River Valley.
Indians of Mexico--Ethnobotany--Mexico--Tehuacán River Valley.
Indians of Mexico--Mexico--Tehuacán River Valley--Antiquities.
Tehuacán River Valley (Mexico)--Antiquities.
Harvard subject headings:
Ethnobotany--Mexico--Tehuacán River Valley.
Indians of Mexico--Ethnobotany--Mexico--Tehuacán River Valley.
Indians of Mexico--Mexico--Tehuacán River Valley--Antiquities.
Tehuacán River Valley (Mexico)--Antiquities.
Princeton subject headings:
Ethnobotany--Mexico--Tehuacán Valley.
Indians of Mexico--Mexico--Tehuacán Valley--Antiquities.
Tehuacán Valley--Antiquities.