Langley, Billy C.  <br/><br/>
Electromechanical and electronic controls for HVAC/R / Billy C. Langley. 

 - Upper Saddle River, New Jersey  Prentice-Hall  1999. 
 - vii, 438p.  ill.  24cm 
<br/><br/><label>ISBN: </label>0139075690  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air conditioning--Control<br/>Heating--Control<br/>Refrigeration and refrigerating machinery--Automatic control
<br/><br/><label>Dewey Class. No.: </label>621.56 LAN 1999