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Charcoal drawing in Chalkquarry by Jos Luyten Valkenburg aan de Geul the Netherlands. en Charcoal drawing in Chalkquarry by Jos Luyten Feb Valkenburg aan de Geul the Netherlands nl Houtskool tekening in Mergelgroeve door Jos Luyten Gemeentegrot Valkenburg aan de Geul Nederland own Bj schoenmakers cczero Uploaded with Gemeentegrot