Okigbo, B.
,
[Fitting research to farming systems: based on observations and preliminary studies of traditional agriculture in Eastern Nigeria: paper presented at the Second International Seminar on Change in Agriculture, Reading, 919 Sept., 1974]
,
Fitting research to farming systems: based on observations and preliminary studies of traditional agriculture in Eastern Nigeria: paper presented at the Second International Seminar on Change in Agriculture, Reading, 919 Sept., 1974
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