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  Halving Africa’s freight transport costs: could it be done? International Symposium Transport and Communications in Africa, Brussels, 27-29 November 1991

  1991
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  Aspects of soil mechanics of particular importance to highway engineering in Africa. 7th Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Accra, Ghana. 1-7 June, 1980

  1980
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  A field study on the deterioration of unpaved roads and the effect of different maintenance strategies. Eighth Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Harare, Zimbabwe, 1984

  1984
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  A view of road maintenance economics and policy in the third world. IRF Executive Conference on the Management of Road Maintenance, Arizona, 11-27 February 1987

  1988
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