Microfossil evidence for pre-Columbian maize dispersals in the neotropics from San Andrés, Tabasco, MexicoDOI: info:10.1073/pnas.0701425104v. 104No. 16National Academy of Sciences (U.S.)6870–6875
Pohl, Mary E. D., Piperno, Dolores R., Pope, Kevin O., and Jones, John G. 2007. "Microfossil evidence for pre-Columbian maize dispersals in the neotropics from San Andrés, Tabasco, Mexico." Proceedings of the National Academy of Sciences of the United States of America, 104, (16) 6870–6875. https://doi.org/10.1073/pnas.0701425104.