TY  - GEN
AU  - Coates, Bob
AU  - Margolis, Bob
TI  - Groups & gemoetry: unit GR4 
SN  - 0749221666
U1  - 512.2 
PY  - 1994///
CY  - Milton Keynes
PB  - The Open University
KW  - Groups and group theory
ER  -