Akhiezer N.I <br/><br/>
Theory Of Linear Operators In Hilbert Space 
/ by N.I Akhiezer 
 - New York  Dover Publications Inc.  1993 
 - 218p. 
<br/><br/><label>ISBN: </label>0486677486 
<br/><br/><label>Dewey Class. No.: </label>515.73  / AKH/T