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Time marker according to Prof. S. Exner (new model)

Zeitmarkierer nach Prof. Sigm. Exner (neues Modell)

  Source   Castagna, Ludwig. 1906. Spezial-Prospekt Physiologisch-graphischer Apparate. Wien: Physiologisches Institut (Collection Rand B. Evans) view the source
  People   Exner, Sigmund, Ritter von Ewarten (1846-1926)
  Sites   [Physiological Institute, University of Leipzig (1877)
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ISSN 1866-4784: reference - xlink