TY  - BOOK
AU  - Tinbergen Jan and others
TI  - Optimum social welfare and productivity:  A comparative view   
T2  - Charles C  Maskowitz, Lectures
U1  - X0gY, L2 
PY  - 1972///
CY  - New York
PB  -  Universtu Press       
KW  - Economics IRT Sociology
N1  - Bibliography: P149-52
ER  -