Some researchers have theorized that the Mazatec, along with Popoloca speakers, once inhabited the lowlands of the Papaloapan basin, but were driven into the adjacent highlands by the expansion of Nahuas.[1]
Mooney, James (1911). "Mazatec Indians". Catholic Encyclopedia. Vol. X (New Advent online reproduction ed.). New York: Robert Appleton and Company. Retrieved 2007-05-02.
Valdés, Leander J., III; José Luis Díaz; Ara G. Paul (1983). "Ethnopharmacology of ska María Pastora (Salvia divinorum, Epling and Játiva-M)". Journal of Ethnopharmacology. 7 (3): 287–312. doi:10.1016/0378-8741(83)90004-1. hdl:2027.42/25229. PMID6876852.{{cite journal}}: CS1 maint: multiple names: authors list (link)