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Compaction of roadway soils = Compactación de suelos viales = Le compactage des sols routiers / prep. by Transportation research board, Commission on sociotechnical systems, National research council.
- National Academy of Sciences,
- 1979.
- Washington, DC :
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Control of erosion = Control de érosion = Contrôle de l'érosion / prep. by Transportation research board, Commission on sociotechnical systems, National research council.
- National Academy of Sciences,
- 1979.
- Washington, DC :
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Africa speaks, America responds : a report on the African council on communication education dialogue "Communication education/training needs in Africa", April 11-13, 1979, Washington, D.C. = L'Afrique parle, l'Amérique répond : rapport sur un dialogue du Conseil africain d'enseignement de la communication sur "Les besoins d'éducation et de formation dans le domaine de la communication en Afrique" du 11 au 13 avril 1979 à Washington, D.C. / prep. by Camille Kurtz and Daniel G. Matthews.
- 86
- African bibliographic center [etc.],
- 1979.
- Washington, DC :