Churchill, Ruel V. <br/><br/>
Complex variables and applications/5th ed. 

 - 5th 
 - New York  Mc Graw -Hill  1990 
 - xvi,361p. 
 - McGraw- Hill series in higher mathematics .
<br/><br/><label>ISBN: </label>0-07-010905-2 
<br/><br/><label>Dewey Class. No.: </label>517.53  / CHU