共 12 条
[3]
KULSHRESHTHA SN, 1971, DEP AGR EC TECHNICAL, V101
[6]
REUTLINGER S., 1966, Journal of Farm Economics, V48, P909, DOI 10.2307/1236621
[7]
ROSAASEN KA, 1978, THESIS U SASKATCHEWA
[8]
SCHMITZ A, 1984, COMMODITY PRICE STAB
[10]
VEEMAN MM, 1982, CAN J AGR ECON, V30, P21, DOI 10.1111/j.1744-7976.1982.tb01962.x