000 00329cam a2200133Ki 4500
082 _a699.3
_bCOP
100 1 _aKroch, Eugene A.
245 1 4 _a copper data.
_b .
260 _aNew York :
_bColumbia University, Graduate School of Business,
_c1953.
300 _a[76 .]P.
490 1 _aResearch paper ;
650 _aMCE
942 _cBK
999 _c9128
_d9128