LIBRARY OF THE 
 
 UNIVERSITY OF ILLINOIS 
 
 AT URBANA-CHAMPAICN 
 
 510.84 
 
Digitized by the Internet Archive 
 
 in 2013 
 
 http://archive.org/details/operationalresul53wier 
 
DIG- 
 
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 OPERATIC^ 
 
 
 -953 
 

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