共 32 条
[1]
AKEHURST BC, 1981, TOBACCO
[2]
Andreae Bernd, 1981, FARMING DEV SPACE WO
[3]
BAILEY J, 1995, CAN MED ASSOC J, V153, P1109
[4]
Boesen Jannik, 1979, The 'Success Story' of Peasant Tobacco Production in Tanzania
[5]
BOOTH A, 1994, STATE ENV SO AFRICA, P133
[6]
Desanker PV., 1997, The miombo network: framework for terrestrial transect study of land-use and land-cover change in the miombo ecosystems of central Africa
[7]
*FAO AGR ORG UN, 1997, PROD YB, V50, P176
[8]
*FOOD AGR ORG UN, 1998, FAO BRIEF MULT COLL
[9]
*FOOD AGR ORG UN, 1995, PROD YB, V48, P176
[10]
*FOOD AGR ORG UN, 1997, STAT WORLDS FOR 1997