圓周率日 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "圓周率日" in Chinese language version.

refsWebsite

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5web.archive.org

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cnet.com

news.cnet.com

McCullagh, Declan. National Pi Day? Congress makes it official. Politics and Law (CNET News). March 11, 2009 [2010-03-13]. （原始内容存档于2022-03-18）.

cnn.com

Landau, Elizabeth (March 12, 2010). "On Pi Day, one number 'reeks of mystery'", CNN. Retrieved on March 14, 2010, from http://www.cnn.com/2010/TECH/03/12/pi.day.math/index.html （页面存档备份，存于互联网档案馆）.

google.com

圓周率日 30 週年紀念！. [2018-03-13]. （原始内容存档于2018-03-14）.

loc.gov

thomas.loc.gov

H. Res. 224. 2009-03-12 [2010-03-13]. （原始内容存档于2014-12-10）.

slate.com

Pi Day: Facts and such （页面存档备份，存于互联网档案馆），Phil Plait，2015-03-13[2015-03-14]（英文）

web.archive.org

Landau, Elizabeth (March 12, 2010). "On Pi Day, one number 'reeks of mystery'", CNN. Retrieved on March 14, 2010, from http://www.cnn.com/2010/TECH/03/12/pi.day.math/index.html （页面存档备份，存于互联网档案馆）.
H. Res. 224. 2009-03-12 [2010-03-13]. （原始内容存档于2014-12-10）.
McCullagh, Declan. National Pi Day? Congress makes it official. Politics and Law (CNET News). March 11, 2009 [2010-03-13]. （原始内容存档于2022-03-18）.
圓周率日 30 週年紀念！. [2018-03-13]. （原始内容存档于2018-03-14）.
Pi Day: Facts and such （页面存档备份，存于互联网档案馆），Phil Plait，2015-03-13[2015-03-14]（英文）