TY  - BOOK
AU  - Koopmans, Tjalling Charles
TI  - Three essays on the state of economic science
PB  - A.M. Kelley
PY  - 1991
T2  - Reprints of economic classics
EP  - ix, 231 p.
UR  - https://ci.nii.ac.jp/ncid/BA13420705
SN  - 0678013977
ER  -