Columbia subject headings:
Industrial relations--New Mexico--History.
New Mexico--Social conditions.
Working class--New Mexico--History.
Harvard subject headings:
Industrial relations--New Mexico--History.
Labor and laboring classes--New Mexico--History.
New Mexico--Social conditions.
Working class--New Mexico--History.
Princeton subject headings:
Industrial relations--New Mexico--History.
Labor--New Mexico--History.
New Mexico--Social conditions.