Roman abacus (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Roman abacus" in English language version.

refsWebsite

Global rank English rank

2web.archive.org

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doi.org (Global: 2^nd place; English: 2^nd place)

Sugden, Keith F. (Fall 1981). "A History of the Abacus". Accounting Historians Journal. 8 (2): 1–22. doi:10.2308/0148-4184.8.2.1.

ryerson.ca (Global: low place; English: low place)

ee.ryerson.ca

Stephenson, Steve. "The Roman Hand-Abacus". Retrieved 2007-07-04.

web.archive.org (Global: 1^st place; English: 1^st place)

"Abacus-Online-Museum of Jörn Lütjens". Archived from the original on 2016-03-27.
"Replica Roman Hand Abacus". Archived from the original on 2012-03-26.