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[Contact Clocks]

Bowditch-Baltzar's Contact Clock

Kontaktuhr nach Bowditch-Baltzar

  Source   Zimmermann, E. 1928. Psychologische und Physiologische Apparate: Liste 50. Leipzig & Berlin (Collection Rand B. Evans) view the source
  People   Bowditch, Henry Pickering (1840-1911)
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ISSN 1866-4784: reference - xlink