Leatherman, Thomas L.; Goodman, Alan (2005-08-01). "Coca-colonization of diets in the Yucatan". Social Science & Medicine. 61 (4): 833–846. doi:10.1016/j.socscimed.2004.08.047. PMID15950095.
Leatherman, Thomas L.; Goodman, Alan (2005-08-01). "Coca-colonization of diets in the Yucatan". Social Science & Medicine. 61 (4): 833–846. doi:10.1016/j.socscimed.2004.08.047. PMID15950095.