"conservation and restoration (1956 - 1997)"@en . "conservation et restauration (1956 - 1997)"@fr . "conservazione e restauro (1956 - 1997)"@it . "Konservierung und Restaurierung (1956 - 1997)"@de . . . . "material (1956 - 1997)"@en . . "matériaux (1956 - 1997)"@fr . . "materiali (1956 - 1997)"@it . . "Material (1956 - 1997)"@de . . "Material (1956 - 1997) (xPraxKonsMat)"@de . .