concept

Technic of refraction, trial case and refractive instruments : a manual of practical refraction with instructions for the operation of the trial case and refractive instruments and methods for successfully carrying out a case of ocular refraction ... / T.G. Atkinson.

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Atkinson, Thomas G. (Thomas George), 1870-

Catalogue

Technic of refraction, trial case and refractive instruments : a manual of practical refraction with instructions for the operation of the trial case and refractive instruments and methods for successfully carrying out a case of ocular refraction ... / T.G. Atkinson.