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- Author(s):
- Wallace, James, 1854- author
- Publication:
- [Philadelphia?] : [publisher not identified], [1889?]
- Subject(s):
- Astigmatism -- diagnosis
Vision Tests -- instrumentation
- Author(s):
- Oliver, Charles A. (Charles Augustus), 1853-1911 author
- Publication:
- [New York?] : [publisher not identified], [1886?]
- Subject(s):
- Visual Acuity
Vision Tests -- instrumentation
- Author(s):
- Oliver, Charles A. (Charles Augustus), 1853-1911, author
- Publication:
- [Boston?] : [publisher not identified], [1886?]
- Subject(s):
- Visual Acuity
Vision Tests -- instrumentation