Jane H. Hill & Kenneth C. Hill 
Speaking Mexicano [PDF ebook] 
Dynamics of Syncretic Language in Central Mexico

The Hills confront far more than what is ’sayable‘ in terms of Mexicano grammar; they deal with what is actually said, with the relationship between Spanish and Mexicano as resources in the community’s linguistic repertoire. . . . One of the major studies of language contact produced within the past forty years. Language"The genius of this work is the integration of the linguistic analysis with the cultural and political analysis." Latin American Anthropology Review