a seminar/workshop on new concepts in maximizing productivity and efficiency in heat processing Industrial Heating Equipment Association American Gas Association text Arlington, Va Industrial Heating Equipment Association c1983 monographic 1 v. (various pagings) : ill. ; 30 cm. Papers presented at the first IHEA Energy Seminar, held at Chicago Marriott O'Hare, Oct. 3-4, 1983. Heat engineering 621 IND 1983 A051 Or.