Walker,Judy L <br/><br/>
Codes and curves 
Judy L Walker 
 - Rhode Island  American Mathematical Society  c2000 
 - xii,66p,;  22cm 
 - Student Mathematical Library IAS  Park City mathematical  sub series .
<br/><br/><label>ISBN: </label>0  8218  2628_x 
<br/><br/><label>Dewey Class. No.: </label>519.4  / WAL