Columbia subject headings:
Fraternal organizations--Mexico--History--19th century.
Printers--Mexico--History--19th century.
Printing--Mexico--Societies, etc.--History--19th century.
Harvard subject headings:
Fraternal organizations--Mexico--History--19th century.
Printers--Mexico--History--19th century.
Printing--Mexico--Societies, etc.--History--19th century.
Princeton subject headings:
Printing industry--Employees--Labor unions--Mexico--History.
Printing industry--Mexico--Employees--History.