Columbia subject headings:
Harvard subject headings:
Glassworkers--Labor unions--Periodicals.
Glassworkers--United States--Periodicals.
Window Glass Cutters League of America.
Princeton subject headings:
Glass blowing and working--History--Periodicals.
Glass blowing and working--Periodicals.
Glass manufacture--History--Periodicals.
Glass manufacture--Periodicals.
Periodicals.
Window Glass Cutters League of America--Employees--Periodicals.
Window Glass Cutters League of America.