Herman Snellen (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Herman Snellen" in English language version.

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amphilsoc.org

Snellen, Herman (1885). Optotypi ad visum determinandum secundum formulam = d/D. Ed. 8, metrico systemate (8 ed.). London: Williams and Norgate. Retrieved 12 September 2023.

Watt, Wendy Strouse. "How Visual Acuity Is Measured" Archived 2020-06-19 at the Wayback Machine, Macular Degeneration Support, October 2003. Accessed July 6, 2010.

Bordsen, John. "Eye Chart Still The Standard For Vision", The Seattle Times, August 9, 1995. Accessed July 6, 2010.

Watt, Wendy Strouse. "How Visual Acuity Is Measured" Archived 2020-06-19 at the Wayback Machine, Macular Degeneration Support, October 2003. Accessed July 6, 2010.