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Title: Precisa calculating machine model 117 [Go to resource]
Description: Precisa calculating machine model 117 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: calculating machine (pinwheel) Temporal: 1955-1965 Source: Science Museum Creator: Precisa Identifier: 1980-96 Go to resource More Like this...
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