Los Altos books/libros

Hello Everyone............especially my new found primos :)

I have been looking like crazy for "Retonos de España en la Nueva Galicia" por Lic. Mariano Gonzalez-Leal and "Familias Endogamicas en Saltillo y los Altos de Jalisco" por Professor Martha Duron Jimenez.
Are they not in print anymore?

Thank you for any help in advance!

Sofia