Beardon, A. F. <br/><br/>
Complex analysis; the argument principle in analysis and topology  / 

 - New York:  John Wiley,  1979 
 - xiii, 239p. Index 
<br/><br/> "A Wiley Interscience publication" 
<br/><br/><label>Dewey Class. No.: </label>515.9  / B368.CA