Mach, Ernet <br/><br/>
Energy conservation :  a report on one of a series of national conferences on the conservation of energy, Museum of Science and Industry, Chicago, Illinois, October 11, 1973 / 
edited by Ernet Mach 
 - Chicago :  Open court pbl.,  1911 
 - 190 p. ;  28 cm. 
 - IIEQ document ; no. 74-6 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energy conservationes
<br/><br/><label>Dewey Class. No.: </label>531.6