Knudsen, Vern Oliver,  1893-1974 <br/><br/>
Architectural acoustics / 
by Vern O. Knudsen 
 - New York :  John Wiley,  1949 
 - 617 p. :  ill., diagrs. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Architectural acoustics