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W.H.L. Janssen van Raaij door Bram Gips . en Geschilderd portret van Janssen van Raaij hoogleraar zuivere en toegepaste wiskunde en de mechanica europeana eu html Geschilderd portret door Gips op europeana eu beschikbaar gesteld door Stichting Academisch Erfgoed Bram Gips other versions cczero Bram Gips Uploaded with Janssen