共 9 条
[2]
BALDY C., 1963, ANN AGRON [PARIS], V14, P489
[3]
EVANS A. C., 1960, EAST AFRICAN AGRIC AND FOREST JOUR, V26, P1
[5]
Holliday R., 1960, Field Crop Abstracts, V13, P159
[6]
Kassam A. H., 1973, Samaru Agricultural Newsletter, V15, P28
[9]
Wit C. T., 1960, COMPETITION