Allen, John R. . <br/><br/>
Heating and Air Conditioning /  Textual Documents 
John R.Allen, James Herbert Walker & John William James. 
 - 6th ed. / 
 - New York :  McGraw - Hill book company ,  1946. 
 - 656p. :  ill ;  22cm . 
<br/><br/><label>Subjects--Index Terms: </label>Air Conditioning Heating G-Technology 
<br/><br/><label>Dewey Class. No.: </label>697.9  / Al 53 H