conservation du bois (1) bois (1) mur (1) vallée (1) état (1) spectroscopie (1) espèce (1) restauration (1) cendre (1) microscopie (1) matériau (1) lumière (1) information (1) analyse (1) environnement (1) dommage (1) substance chimique (1) cellulose (1) ordre (1) The Valley (1) Preservation (1) Identification (1) Antiquities, Prehistoric (1) Microscopy (1) Work (1) Wood--Preservation (1) Wood (1) Visibility (1) Tissues (1) Spectrum analysis (1)