共 5 条
[1]
BRUBAKER JL, 1963, ASAE63828 PAP
[2]
BUELOW FH, 1961, ASAE61822 PAP
[3]
LAWTON PJ, 1978, DNCS76910007 NAT I A
[4]
1961, AGRICULTURAL ENGR YB
[5]
1970, CANADIAN CODE PRACTI