共 39 条
[32]
SMIDT S, 1965, FOOD RESEARCH I STUD, V5
[34]
TOMEK WG, 1970, AM J AGRICULTURE ECO, V52
[35]
1956, J FARM ECONOMICS DEC, P1427
[36]
1960, FOOD RESEARCH I STUD, V1, P187
[37]
[No title captured]
[38]
1934, J AM STATISTICAL ASS, V29, P11
[39]
1958, AM ECONOMIC REV MAY, P188