Average visual acuteness / by Freeland Fergus.
- Fergus, A. Freeland (Andrew Freeland), 1858-1932
- Date:
- [1903?]
Licence: In copyright
Credit: Average visual acuteness / by Freeland Fergus. Source: Wellcome Collection.
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Licence: In copyright
Credit: Average visual acuteness / by Freeland Fergus. Source: Wellcome Collection.