Linear operators and operator equations   
ed. by V.I. Smirnov 
 - New York  Consultants Bureau  1971 
 - v, 129p. 
 - Problems in Mathematical Analysis - V.2 .
<br/><br/><label>ISBN: </label>306 18702 7 
<br/><br/><label>Dewey Class. No.: </label>515.72  / N712