Langley, Billy C. <br/><br/>
Heating, ventilating, air conditioning, and refrigeration / 
Billy C. Langley 
 - 4th ed. 
 - Englewood Cliffs, N.J.  Prentice Hall  1990 
 - xiv, 738p.  ill.  29 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0133856348  RM215.46 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air conditioning<br/>Refrigeration and refrigerating machinery