TY  - BOOK
AU  - Leech, J.W.
AU  - Newman, D. J.
TI  - How to use groups
T2  - Methuen's Monographs on Physical Subjects
SN  - 412 20660 9
U1  - 512.22 
PY  - 1969///
CY  - London
PB  - Methuen & Co. Ltd.
ER  -