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Description: Folder of test type charts (7), invented by Wecker and Masselon, French, 1930-1970 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: test types Temporal: 1930-1970 Source: Science Museum Creator: Doin, Octave (maker) Identifier: A608273 Go to resource More Like this...
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