Columbia subject headings:
Harvard subject headings:
Food crops
Indians of Central America--Ethnobotany.
Indians of South America--Ethnobotany
Plant production.
Plants and civilization--Central America.
Plants and civilization--South America.
Plants and civilization--Spain.
Princeton subject headings:
Heirloom varieties (Plants)--Central America.
Heirloom varieties (Plants)--South America.
Heirloom varieties (Plants)--Spain.
Indians of Central America--Ethnobotany.
Indians of South America--Ethnobotany.
Plants and civilization--Central America.
Plants and civilization--South America.
Plants and civilization--Spain.