langley,Billy C. <br/><br/>
Fundamentals of air conditioning systems / 
langley,Billy C. 
 - 2nd ed 
 - Lilburn:  The Fairmont Press,  1931. 
 - viii,399p;24cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0881733466 
<br/><br/><label>Dewey Class. No.: </label>697.9'3 LAN