TY  - BOOK
AU  - Collins, Lyndhurst
AU  - 
TI  - Use of Models in the Social Science
U1  - 3.001.57 
PY  - 1976///
CY  - London
PB  - Tavistock
KW  - Social science-Research Methodlogy
N1  -  Bibliog at the end of each chapter
ER  -