Clay building materials industries in Africa - Workshop on Clay Building Materials Industries in Africa (1970 : Tunis, Tunisia); United Nations Industrial Development Organization (New York : United Nations, 1971)
"United Nations publication. Sales no.: E.71.II.B.24."
At head of title: United Nations Industrial Development Organization, Vienna.
"Including a summary of lectures presented to the workshop."
Keywords: Clay industries -- Africa -- Congresses; Brick trade -- Africa -- Congresses