Levenhagen, John I. & Spethmann, Donald H. <br/><br/>
HVAC Controls and Systems 
By John I. Levenhagen & Donald H. Spethmann 
 - New York  McGraw-Hiill, Inc.  1993 
 - xi, 334 pages, 23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0-07-037509-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heating-Control.<br/>Air conditioning-Control
<br/><br/><label>Dewey Class. No.: </label>697 L57