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1Seed exchange networks of native maize, beans, and squash in San Juan Ixtenco and San Luis Huamantla, Tlaxcala, Mexico Seed exchange networks of native maize, beans, and squash in San Juan Ixtenco and San Luis Huamantla, Tlaxcala, Mexicoby Llamas Guzmán, Luz P. autora, Lazos Chavero, Elena Doctora autora 22392, Perales Rivera, Hugo Rafael Doctor autor 8273, Casas Fernández, Alejandro Doctor autor 14491Texto bibliotecaECOSUR