SUBJECT
Refrigeration and refrigerating machinery
Air conditioning
39
Heating
19
Ventilation
12
Equipment and supplies
6
Heat engineering
5
Handbooks, manuals, etc
3
Maintenance and repair
3
Solar radiation
3
Buildings
2
Cold storage
2
Environmental engineering
2
Heat
2
Transmission
2
Air-Conditioning
1
Airconditioning
1
Climatic factors
1
Design and construction
1
Dictionaries, Polyglot
1
Electrical engineering
1
Frozen foods
1
Handbooks, mannuals. etc
1
Heat pumps
1
Heat-Transmission
1
Ice
1
Manufactures
1
Polyglot
1
Refrigerators
1
Solar air conditioning
1
Stirling engines
1
Ventillation
1