TY  - BOOK
AU  - Niessen Manfred Ed.
AU  -  Peschar Jules Ed.
TI  - International co-operative research :  Problems of   
U1  - Sigma b4, M2 
PY  - 1982///
CY  - New York
PB  - Pergamon USA        
KW  - Social Science
N1  - European co-oreination center for research and documentation in social sciences
ER  -