File:TheStephensonAbacus-ArchD.pdf
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TheStephensonAbacus-ArchD.pdf (file size: 2.68 MB, MIME type: application/pdf)
Full size counting board abacus (36 in. x 24 in.)
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 11:25, 2 September 2013 | (2.68 MB) | Sks23cu (talk | contribs) | |
| 10:48, 2 September 2013 | (7.35 MB) | Sks23cu (talk | contribs) | ||
| 07:34, 10 August 2013 | (2.21 MB) | Sks23cu (talk | contribs) | Full size counting board abacus (36 in. x 24 in.) |
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