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programme and meeting document
Conférence sur la science et la technologie en Afrique: rapport final
1994
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programme and meeting document
Les Sols des régions semi-arides d'Afrique et leur mise en valeur
28 Apr. 1950
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programme and meeting document
Rapport sur les régions arides et semi-arides de l'Afrique du Nord
28 Apr. 1950
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programme and meeting document
Report on the arid and semi-arid regions of North Africa
28 Apr. 1950
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programme and meeting document
Soils of the semi-arid areas of Africa and their development
28 Apr. 1950
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book
Stone in Southern Africa
UNESCO
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programme and meeting document
Symposium on Science and Technology in Africa: final report
1994
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