共 22 条
[11]
*PHELPS DODG, 1982, ANN REP
[12]
PRAIN R, 1975, COPPER ANATOMY IND
[13]
Radetzki M., 1985, STATE MINERAL ENTERP
[14]
RADETZKI M, 1983, NATURAL RESOURCE JAN
[15]
SCHERER FM, 1980, IND MARKET STRUCTURE, pCH7
[16]
TOBIN J, 1958, ECONOMETRICA JAN
[17]
Varian H., 1992, MICROECONOMIC ANAL, V3
[18]
VITERBO P, 1984, NATURAL RESOURCES FO, V4
[19]
Wagenhals G, 1984, WORLD COPPER MARKET
[20]
*WOLFF R CO LTD, 1982, PROSP COPP