TY  - BOOK
AU  - Magnus, W
AU  - Karrass, A
AU  - Solitar, D
TI  - Combinatorial group theory: presentations of groups in terms of generators and relations
SN  - 0-486-63281-4
PY  - 1976///
CY  - New York
PB  - Dover Publications
KW  - Calculus
KW  - Nielsen Transformation
ER  -