Sury, B <br/><br/>
Congruence Subgroup Problem:An Elementary Approach Aimed at Applications 

 - New York  Robert e Krieger  2003 
 - xv+30 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natiral Sciences--General Stack--MathematicsAlgebraMathematics
<br/><br/><label>Dewey Class. No.: </label>512.2  / SUR-C