Beardon, A. F. <br/><br/>
Complex analysis :  the argument principle in analysis and topology / 
A. F. Beardon 
 - Chichester :  John Wiley & Sons,  1979 
 - xiii, 239 p. :  ill. ;  23 cm. 
<br/><br/> 'A Wiley-Interscience publication.'  Includes index 
<br/><br/>Bibliography : p. 235-236 
<br/><br/><label>ISBN: </label>0471996718 
<br/><br/><label>LCCN: </label>78-8540 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Functions of complex variables<br/>Numbers, Complex