Informatics and mathematics in secondary schools, impacts and relationships : proceedings of the IFIP TC-3 Working Conference on Informatics and Mathematics in Secondary Schools, Impact and Relationship - IFIP TC-3 Working Conference on Mathematics and Informatics in secondary Schools, Impacts and Relationships; Johnson, D. C. (David Carlton); Tinsley, J. D. (John David); IFIP Technical Committee 3, Education (North-Holland Pub. Co., 1978)