Spiegel, M.R. <br/><br/>
Complex variables / 
M.R. Spiegel. 
 - [S.l.] :  McGraw-Hill Education - Europe,  1974 
 - 1 v. (unpaged) ;  27 cm. 
<br/><br/><label>ISBN: </label>0070990107 9780070990104 
<br/><br/><label>Dewey Class. No.: </label>515.9