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The relationships between cacao viruses and their vectors : the feeding behaviour of three mealybug (Homoptera: Pseudococcidae) species / by P.F. Entwistle and J.F. Longworth.
- West African research institute,
- 1963.
- Ibadan, Nigeria :
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Socio-economic factors affecting the productivity of agriculture in Okigwi division (Eastern region) : preliminary report / Charles A.P. Takes.
- 862.9
- Nigerian Institute of Social and Economic Research,
- 1963.
- Ibadan, Nigeria :
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Economic problems of peasant storage in Western Nigeria / by Q.B.O. Anthonio.
- 862.9
- Ministry of economic planning and community development. Economics division,
- 1963.
- Ibadan, Nigeria :