Columbia subject headings:
Chicago House Wrecking Co.--Catalogs.
Plumbing--Equipment and supplies--Catalogs.
Steam-boilers--Catalogs.
Steam-heating--Equipment and supplies--Catalogs.
Harvard subject headings:
Chicago House Wrecking Co.--Catalogs.
Dwellings--Heating and ventilation--Catalogs.
Farm buildings--Heating and ventilation--Catalogs.
Greenhouses--Heating and ventilation--Catalogs.
Heating equipment industry--Catalogs.
Heating--Equipment and supplies--Catalogs.
Plumbing--Equipment and supplies--Catalogs
Steam-heating--Equipment and supplies--Catalogs.
Princeton subject headings: