Weidmann, J  <br/><br/>
Graduate Texts in Mathematics   : Liner Operators in Hilbert Spaces  
/ by Joachim Weidmann 
 - New York:  Springer,  1980. 
 - xiii, 402p. 
<br/><br/><label>ISBN: </label>9781461260295 
<br/><br/><label>Dewey Class. No.: </label>511.5  / WEI/G