共 5 条
[1]
Becker G. S., 1991, TREATISE FAMILY
[3]
LENTNEK B, 1981, EC GEOGR, V57, P4
[4]
NARULA SC, 1979, SUNY454 DEP EC DISC
[5]
Varian H., 1992, MICROECONOMIC ANAL, V3