records for San Pedro Piedra Gorda, Cuauhtemoc, Zacatecas.

I've been asked to help someone find family from San Pedro Piedra Gorda, Cuauhtemoc, Zacatecas and I'm not familiar with it at all, any suggestions where it's located or if there are films from there? They are searching for their grandfather Carlos Vasquez, born abt 1901, mother is Juana Saucedo. That's all the information they have. The rest of this family is from Jerez Zacatecas Mexico.

thanks for any help, Linda in Everett