作者
Sathasivampillai, K.
8
De Silva, G. A. C.
4
Agrarian Research and Training Institute
2
Sri Lanka. Division of Agricultural Economics
2
Gooneratne, Wilbert, 1938-
1
Gunatunga, C.
1
Mileham, S. M. K.
1
Ranasinghe, W.
1
Ratnaweera, D. de S.
1
UNDP/FAO Agricultural Diversification Project
1
Wimaladharma, Kapila P.
1