The convergence index as a measure of the converging power / by Alexander Duane.

  • Duane, A. (Alexander), 1858-1926.
Date:
1914

Licence: In copyright

Credit: The convergence index as a measure of the converging power / by Alexander Duane. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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