A tous les Comites Nationaux du VIIe Festival Letter by the International Preparatory Committee of the 7th World Youth and Students' Festival - Melendez Fermin Luis; Melendez Fermin Luis; Bariona Mario; Bariona Mario; Bernini Bruno; Bernini Bruno; Foukner Ing. A.; Foukner Ing. A.; Garcias Jean; Garcias Jean; Ardaly Daouda; Ardaly Daouda; et al.