%A Daal, J. van %A Merkies, A. H. Q. M. %T Aggregation in economic research : from individual to macro relations %I D. Reidel. Pub. Co.,Distributed in the U.S.A. and Canada by Kluwer Academic Publishers %D 1984 %S Theory and decision library %V v. 41 %U https://ci.nii.ac.jp/ncid/BA03534060