Wallis, R. Allan <br/><br/>
Axial flow fans and ducts 
R. Allan Wallis 
 - New York  Wiley  c1983 
 - ix, 444 p.  ill.  24 cm. 
<br/><br/> "A Wiley-Interscience publication." 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fans (Machinery)<br/>Air ducts
<br/><br/><label>Dewey Class. No.: </label>621.6  / 1