CAD/CAM as a basis for the development of technology in developing nations proceedings of the IFIP WG 5.2 International Conference on CAD/CAM as a Basis for the Development of Technology in Developing Nations, Sao Paulo, Brazil, October 21-23, 1981 - Encarnacao, Jose Luis; Torres, Oswaldo Fadigas Fontes; Warman, Ernest, 1935- (North-Holland Pub. Co. Sole distributors for the U.S.A. and Canada, Elsevier North-Holland, 1981)