共 23 条
[3]
[Anonymous], 1988, From agronomic data to farmer recommendations: An economics training manual
[7]
GOODWIN BK, 1992, J AGR RESOUR ECON, V17, P110
[8]
GOODWIN BK, 1993, UNPUB SIMPLIFIED EST
[9]
HAULE KI, 1990, MAIZE RES TANZANIA, P127
[10]
KEREGERO KJ, 1991, P TECHN CONS ALT EXT, P10