Roe, J <br/><br/>
Winding around  the winding number in topology, geometry, & analysis 
J. Roe 
 - Providence  American Mathematical Society  2015 
 - xiii  269 
 - Student mathematical library 76 .
<br/><br/><label>ISBN: </label>9781470421984 
<br/><br/><label>Dewey Class. No.: </label>515.15  / ROE