Thanks to Carol Turner and Maria Cortez for these two great URL's. . .if someone gets a chance can you put these into the "Links" section?
http://www.statemuseum.arizona.edu/drsw/index.html
go to the DRSW Master database and plug in a Surname---do Diaz for example. This is a great website.
Also check out the webpage for:
Biblioteca Digital Daniel Cosío Villegas
joseph