アバカス (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "アバカス" in Japanese language version.

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1merriam-webster.com

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653^rd place

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1historyforkids.org

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1religiondispatches.org

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57^th place

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832^nd place

448^th place

1mizumaki.lg.jp

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791^st place

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576^th place

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aph.org

Terlau, Terrie; Gissoni, Fred (July 20, 2006), Abacus: Position Paper, APH.org, http://www.aph.org/tests/abacus.html 2009年10月23日閲覧。

csmonitor.com

“Ancient calculator is a hit with Japan's newest generation / The Christian Science Monitor”. CSMonitor.com (1982年7月20日). 2012年6月6日閲覧。

daum.net

enc.daum.net

“주판 : Daum 백과사전” (Korean). Enc.daum.net. 2012年6月6日閲覧。

ed.gov

eric.ed.gov

Robert C. Good, Jr., "The binary abacus: a useful tool for explaining computer operations", Journal of Computers in Mathematics and Science Teaching, vol.5, Iss.1（Fall 1985）, pp.34-37.

google.co.jp

books.google.co.jp

"Chinese abacus." Popular Science, August 1948, pp. 87–89.

historyforkids.org

“West Asian Mathematics”. History for Kids!. 2012年6月6日閲覧。

inaoep.mx

Nepohualtzintzin The Pre Hispanic Computer

merriam-webster.com

Merriam-Webster, "an instrument for performing calculations by sliding counters along rods or in grooves" [1]

mizumaki.lg.jp

town.mizumaki.lg.jp

5つ珠そろばん（茶）

quipus.it

Andean Calculators, Antonio Aimi, Nicolino De Pasquale（translated by Franca Del Bianco）

religiondispatches.org

Nancy Marie Brown, "The Abacus and the Cross: The Story of the Pope Who Brought the Light of Science to the Dark Ages"; see a presentation at http://www.religiondispatches.org/books/rd10q/3878/everything_you_think_you_know_about_the_dark_ages_is_wrong/

ryerson.ca

ee.ryerson.ca

stlawu.edu

it.stlawu.edu

“Chronology of Mesopotamian Mathematics”. It.stlawu.edu (2001年5月30日). 2012年6月6日閲覧。

thocp.net

“Abacusmiddle ages, region of origin Middle East”. Thocp.net (2002年9月12日). 2012年6月6日閲覧。

tux.org

“MesoAmerican Abacus”. Tux.org. 2012年6月6日閲覧。