Columbia subject headings:
Dwellings--Heating and ventilation--Congresses.
Solar air conditioning--Congresses.
Solar heating--Congresses.
Harvard subject headings:
Dwellings--Heating and ventilation--Congresses.
Solar air conditioning--Congresses.
Solar heating--Congresses.
Princeton subject headings:
Dwellings--Heating and ventilation--Congresses.
Solar air conditioning--Congresses.
Solar heating--Congresses.