TY  - BOOK
AU  - Schwerdtfeger,Hans
TI  - Introduction to group theory 
SN  - 9028604952 
U1  - 512.86 
PY  - 1976///
CY  - Leyden
PB  - Noordhoff International Publishing
KW  - Group theory
KW  - Arithmetic groups
N1  - Includes indexes
ER  -