共 17 条
[1]
FRIEND DW, 1979, J ANIM SCI, V49, P330
[5]
Klein K. K., 1979, Canadian Journal of Agricultural Economics, V27, P61, DOI 10.1111/j.1744-7976.1979.tb02945.x
[6]
KLEIN KK, 1981, CAN J AGR EC, V29
[7]
RICARD FH, 1980, QUALITY POULTRY GAME, P31
[8]
ROBBLEE AR, 1978, CANADIAN RAPESEED ME, V51, P12