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Description: "Beale Collin's Picture Types", wall charts printed on one side with test types for assessing visual acuity of children or illiterates, made by Hamblin of London, 1920-1950 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: test types Temporal: 1920-1950 Source: Science Museum Creator: Hamblin (maker) Identifier: A625249 Go to resource More Like this...
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