Sury, B. <br/><br/>
Congruence Subgroup Problem  An Elementary Approach aimed at applications 

 - New Delhi  Hinudstan Book Agency  2003 
 - xv,301p.  24 cm. HB 
 - Texts and Readings in Mathematics .
<br/><br/><label>ISBN: </label>8585931380 
<br/><br/><label>Dewey Class. No.: </label>512.72  / SUR