TY  - BOOK
AU  - Lengrand, Paul.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 856642711
SN  - 2
PY  - 1975///46
CY  - London
PB  - Croom Helm
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Continuing education
N1  - 5
ER  -