conventionDeclaration detailLevel http://ica-atom.org/doc/RS-2#5.4 Artes Visuales person Hayter, William conventionDeclaration Bill Hayter conventionDeclaration conventionDeclaration Hayter, Bill conventionDeclaration conventionDeclaration 1901 - 1988 Inglaterra Francia Fondo Eugenio Téllez Correspondencia Enrique Lihn's XYZ Review project. Artículo Carta de Fredercik A. Lyman a Eugenio Téllez