(F/E/S) : French, English and Spanish version; See French version in SEMINAIRE TECHNIQUE LATINO-AMERICAIN SUR L'INFORMATION TECHNIQUE CONTENUE DANS LES DOCUMENTS DE BREVETS : MEXICO 26-28 OCTOBRE 1978; See Spanish version in SEMINARIO TECNICO LATINOAMERICANO SOBRE INFORMACION TECNOLOGICA CONTENIDA EN LOS DOCUMENTOS DE PATENTES : CIUDAD DE MEXICO, 26-28 DE OCTUBRE DE 1977; WIPO in cooperation with the Economic Commission for Latin America (ECLA) and the General Secretariat of the United Nations Conference on Science and Technology for development (UNCSTD);.