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ilustrasibukupiringantikbarang antikgambartua
Abacus from Map Modeling in Geography, Including the Use of Sand, Clay, Putty, Paper Pulp, Plaster of Paris... Also Chalk Modeling in its Adaptation to Purposes of Illustration. Fully Illustrated published by E.L Kellogg & Co. (1895).
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"Máchina de calcular Brungsviga"
ilustrasibuku
"Machina de calcular de Maurel e Jayet".
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