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Die große Enzyklopädie des mechanischen Rechnens

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Patent:DE570404


Patent:DE 570404
Title:Rechenlehrmittel
Date:15.02.1933
Place:
Country:Germany
Person:Roepke, Liselotte (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 DE570404


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