000 00279nam a2200097 4500
245 _aThree essays on the state of economic science
_cTjalling C. Koopmans
100 _aKoopmans, Tjalling C.
260 _aNew York
_bMcGraw-Hill
_c1957
300 _axi, 231p.; 23cm.
082 _a330
_bKOO
999 _c20709
_d20709