Dan,
 
You might want to look at my now ancient MA thesis:
 
Ronald V. May
1975 "Mexican Majolica In Northern New Spain: A Model For Interpreting  
Ceramics Change." A Thesis Presented to the Faculty of San Diego State  University 
In Partial Fulfillment of the Requirements for the Degree Master of  Arts in 
Anthropology. February 1975.
 
The University of South Caroline has reproduced it and Coyote Press in  
California also sells copies. Of course, it is probably also available on  
Interlibrary Loan.
 
Ron May
Legacy 106, Inc.