TY  - BOOK
AU  - Collins Lyndhurst Ed.
TI  - Use of models in the social sciences
T2  - Social Issues In The Seventies. 4
SN  - 0 422 74620 7
U1  - Sigma:(B), L6 
PY  - 1976///
CY  - London
PB  - Tavistock U K        
KW  - Social Science
ER  -