Columbia subject headings:
Harvard subject headings:
Saltillo (Coahuila, Mexico)--Economic conditions.
Saltillo (Coahuila, Mexico)--History.
Saltillo (Coahuila, Mexico)--Social conditions.
Princeton subject headings:
Saltillo (Coahuila, Mexico)--Economic conditions.
Saltillo (Coahuila, Mexico)--Social conditions.