Chers Amis Letter by the World Federation of Democratic Youth (WFDY/PODN) on the 4th World Youth and Students' Festival - Bernini Bruno; Bernini Bruno; Κατερίνης Π.; Katerinis P.; Fischer Oscar; Fischer Oscar; F.M.J.D. (Federation Mondiale de la Jeunesse Democratique); World Federation of Democratic Youth (WFDY/PODN)