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Title: Snellen's test type, United Kingdom, 1901-1930 [Go to resource]
Description: Snellen's test type for distance, card, British, early 20th century License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Snellen test types Temporal: 1901-1930 Source: Science Museum Creator: Unknown maker Identifier: 1977-627/25 Go to resource More Like this...
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