共 33 条
[13]
GUTHRIE HA, 1986, INTRO NUTRITION
[14]
HUANG KS, 1985, USDA1714 EC RES SERV
[15]
Judge G., 1980, THEORY PRACTICE ECON
[16]
Kinnucan H., 1986, North Central Journal of Agricultural Economics, V8, P93, DOI 10.2307/1349085