Sketch sheet, testimony, Rudolf Weyr, Vienna 1847 - 1914 Vienna, drawing, pencil, tracing paper, × cm, 'Testimony, It is hereby confirmed that, Vienna on August 13, 1910 / Rudolf Weyr / Prof, Austria

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Keywords: -, 13, 1847, 1910, 1914, august, austria, confirmed, drawing, paper, pencil, prof, rudolf, sheet, sketch, testimony, tracing, vienna, weyr