TY  - BOOK
AU  - Van Daal J
AU  -  Merkies A H Q M
TI  - Aggregation in economic research:  From industrial   
U1  - X: (B), M4 
PY  - 1984///
CY  - Holland
PB  - D Riedel         
KW  - Mathematics Economics
N1  - Theory and Decision Library
ER  -