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Fig 1.
AugustWeismann 1834 1914 oil painting Photographcourtesyof Prof Klaus Sander . View in document p.2Fig 2.
Hans Driesch 1867 1941 Phorographcourtesyof Prof Klaus Sander . View in document p.3Fig 3.
Wilhelm Roux 1850 1924 Photograph courtesy of Prof Klaus Sander . View in document p.5Updating...