TY  - BOOK
AU  - Gallian,Joseph A.
TI  - Contemporary abstract algebra / 
SN  - 9788131520741
U1  - 512.02 23
PY  - 2013///.
CY  - New Delhi : 
PB  - Cengage Learning, 
KW  - Integers and equivalent realation.
KW  - Isomorphims.
KW  - External direct products.
ER  -