Dowson, H. R. <br/><br/>
Spectral theory of linear operators  / 

 - London:  Academic Press,  1978 
 - xii, 422p. Bibl. Index. 
 - London Mathematical Society monographs   no. 12 .
<br/><br/><label>Dewey Class. No.: </label>515.72  / D752.ST