共 47 条
[1]
ANDERSON D, 1990, GRAIN QUALITY NEWSLE, V11, P2
[2]
Belsley DA, 1980, Regression diagnostics: Identifying influential data and sources of collinearity
[5]
CRAMER G, 1993, GRAIN MARKETING
[6]
ESPINOSA JA, 1991, WESTERN J AGR ECON, V16, P72
[7]
Ethridge D. E., 1982, WESTERN J AGR ECON, V7, P293
[8]
*FED GRAIN INSP SE, 1991, INSP GRAIN PRACT PRO
[9]
*FOR AGR SERV, 1995, WORLD OILS SIT OUTL
[10]
FRIEDMAN LS, 1984, MICROECONOMIC POLICY