TY  - BOOK
AU  - Sury, B
TI  - The Congruence subgroup problem: an elementary approach aimed at application
SN  - 8879911985
U1  - 515.35 SUR 
PY  - 2003///
CY  - New Delhi
PB  - Hindustan book agency
N1  - Includes bibliographical references
ER  -