http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Papers presented at the Symposium on Unitary Air Conditioning Material - New and Old at the annual meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Aug. 22-25, 1973, Washington, D.C
Unitary air conditioning material - new and old
Symposium on Unitary Air Conditioning Material--New and Old (1973 : Washington, D.C.)
American Society of Heating, Refrigerating and Air-Conditioning Engineers