Title: Pre-Columbian plant migration
Subjects: Agriculture, Congresses, Ethnobotany, Indians, Migration, Plants, Biogeography, Botany & plant sciences, Plant Geography, Technology & Industrial Arts, History: American, Agriculture - Agronomy, Archaeology, Pre-Columbian Archaeology, Business / Economics / Finance, Mayas, The Americas, Business & Economics, Economic Conditions, Indians of Central America, Indians of Mexico, Indians of north america, agriculture, Plants, migration, Human ecology, Mayas, antiquities