Wallis, R. Allan. <br/><br/>
Axial flow fans and ducts  / 
Allan R. Wallis. 
 - New York :  Wiley,  1983. 
 - ix, 444 p. :  ill. ;  25 cm. 
<br/><br/> "A Wiley-Interscience publications". 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fans (Machinery)<br/>Air ducts.
<br/><br/><label>Dewey Class. No.: </label>621.61