共 15 条
[1]
BOEHLJE M, 1987, SEP NAT INV WORKSH B, P167
[2]
BUTLER LJ, 1987, SEP P NAT INV WORKSH, P177
[3]
Cochrane Willard W, 1965, CITY MANS GUIDE FARM
[4]
FALLERT R, 1987, USDA AE579 EC RES SE
[6]
KALTER RJ, 1985, AE8520 CORN U DEP AG
[7]
KALTER RJ, 1987, SEP P NAT INV WORKSH, P121
[9]
Lesser W., 1986, North Central Journal of Agricultural Economics, V8, P159, DOI 10.2307/1349156
[10]
LUENING R, 1987, WISCONSIN FARM ENTER