(F/E/S) : French, English and Spanish version; See all details of volumes in French version in ETUDES SUR DES QUESTIONS CONCERNANT LA REVISION DE LA CONVENTION DE PARIS : PREPAREES PAR DES CONSULTANTS SUR L'INVITATION DU DIRECTEUR GENERAL DE L'OMPI : [2 VOLUMES]; See English version in STUDIES ON QUESTIONS CONCERNING THE REVISION OF THE PARIS CONVENTION : WRITTEN BY CONSULTANTS ON THE INVITATION OF THE DIRECTOR GENERAL OF WIPO : [2 VOLUMES];.