共 15 条
[1]
ABRAHAMSEN MA, 1977, B USDA FARMER COOPER, V1, P6
[2]
BUNJE RB, 1980, ESCS26 USDA COOP INF
[3]
DAVIDSON DR, 1980, ESCS18 USDA COOP INF
[4]
DUNN JR, 1979, ESCS438 USDA AGR EC, P241
[5]
GRIFFIN N, 1980, ESCS17 USDA FARM COO
[6]
HESSION CH, 1969, ASCENT AFFLUENCE HIS, P292
[7]
HOAG WG, 1976, FARM CREDIT SYSTEM, P43
[8]
KIRKMAN CH, 1978, ESCS5 USDA COOP INF, P32
[9]
KNAPP JG, 1955, FCS B FARMER COOPERA, V1, P10
[10]
MARION BW, 1978, N CENTRAL REGIONAL R, V256