Columbia subject headings:
Harvard subject headings:
Glassworkers--Great Britain--History--19th century.
Glassworkers--Labor unions--Great Britain--History--19th century.
Skilled labor--Great Britain--History--19th century.
Princeton subject headings:
Glassworkers--Great Britain--History--19th century.
Glassworkers--Labor unions--Great Britain--History--19th century.
Skilled labor--Great Britain--History--19th century.