[100 years of professional expositions of heating- and air-technology installations. On the 9th ish 1977 from 23--27 March 1977].
D000389:Air Conditioning / Q000266:history; D005085:Exhibitions as Topic; D005858:Germany; D005860:Germany, West; D006361:Heating / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D014691:Ventilation / Q000266:history
100 Jahre Fachausstellungen von Heizungs- und lufttechnischen Anlagen. Zur 9. ish 1977 vom 26. bis 27. März 1977