Lagemann, Johannes

ID:DA04425781

別名: Lagemann, J. (Johannes)

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1

The impact of agricultural research in tropical Africa : a study of the collaboration between the international and national research systems

Hans E. Jahnke, Dieter Kirschke, and Johannes Lagemann ; in collaboration with K.J. Billing ... [et al.]

World Bank c1987 CGIAR study paper no. 21

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2

Sistemas de finca en Acosta-Puriscal Costa Rica

H. von Platen, G. Rodriguez P. y J. Lagemann

CATIE 1982

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3

Traditional African farming systems in eastern Nigeria : an analysis of reaction to increasing population pressure

von Johannes Lagemann

Weltforum Verlag 1977 Afrika-Studien 98

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