Columbia subject headings:
American Radiator Company--Catalogs.
Boilers--Catalogs.
Heating--Equipment and supplies--Catalogs.
Radiators--Catalogs.
Harvard subject headings:
American Radiator Company--Catalogs.
Heating equipment industry--Catalogs.
Pipe fittings--Catalogs.
Radiators--Catalogs.
Steam-boilers--Catalogs.
Steam-heating--Equipment and supplies--Catalogs.
Princeton subject headings: