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C.J. van Loon door Bram Gips . en Geschilderd portret van van Loon hoogleraar Delfstofkunde Aardkunde en Mijnkunde leraar europeana eu html Geschilderd portret door Gips op europeana eu Stichting Academisch Erfgoed other versions cczero Uploaded with Bram Gips Mining engineers from the Netherlands Data provider Stichting Academisch