Langley, Billy C.,  1931- <br/><br/>
Heat pump technology 
Billy C. Langley 
 - Reston, Va  Reston Pub. Co.  c1983 
 - ix, 373 p.  ill.  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heat pumps
<br/><br/><label>Dewey Class. No.: </label>621.402  / 5