1![Formal Proof—The FourColor Theorem Georges Gonthier The Tale of a Brainteaser Francis Guthrie certainly did it, when he coined his innocent little coloring puzzle inHe managed to embarrass successively his mathe Formal Proof—The FourColor Theorem Georges Gonthier The Tale of a Brainteaser Francis Guthrie certainly did it, when he coined his innocent little coloring puzzle inHe managed to embarrass successively his mathe](https://www.pdfsearch.io/img/d75ea701cbd3262c968c1abaffa9193b.jpg) | Add to Reading ListSource URL: www.ams.orgLanguage: English - Date: 2008-11-20 13:33:05
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2![THE ANCESTRY OF John Francis Guthrie Sr. An ahnentafel is one way to view the ancestry of an individual, showing a narrative version of the pedigree of the focus individual — in this case, JOHN FRANCIS GUTHRIE SR. — THE ANCESTRY OF John Francis Guthrie Sr. An ahnentafel is one way to view the ancestry of an individual, showing a narrative version of the pedigree of the focus individual — in this case, JOHN FRANCIS GUTHRIE SR. —](https://www.pdfsearch.io/img/cf1155facbd993339ba54711532ad4af.jpg) | Add to Reading ListSource URL: www.americanancestors.org- Date: 2014-11-13 16:20:54
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3![A note on the history of the four-colour conjecture arXiv:1201.2852v1 [math.CO] 13 Jan 2012 Brendan D. McKay Research School of Computer Science Australian National University A note on the history of the four-colour conjecture arXiv:1201.2852v1 [math.CO] 13 Jan 2012 Brendan D. McKay Research School of Computer Science Australian National University](https://www.pdfsearch.io/img/67a48eab5c7739016ca9d5f58f4edadd.jpg) | Add to Reading ListSource URL: arxiv.orgLanguage: English - Date: 2014-01-22 02:55:40
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4![The Four Colour Theorem Vincent Schlegel University of Adelaide August 17, 2012 The Four Colour Theorem Vincent Schlegel University of Adelaide August 17, 2012](https://www.pdfsearch.io/img/f56a6bce963b3372a4d052d0c576c3ce.jpg) | Add to Reading ListSource URL: www.aums.org.auLanguage: English - Date: 2013-10-07 19:22:42
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5![Southern Campaign American Revolution Pension Statements Pension application of Francis Guthrie (Guthrey) R4395 fn9NC Transcribed by Will Graves[removed]State of Georgia, County of Habersham Southern Campaign American Revolution Pension Statements Pension application of Francis Guthrie (Guthrey) R4395 fn9NC Transcribed by Will Graves[removed]State of Georgia, County of Habersham](https://www.pdfsearch.io/img/08969cd15c2a4d738c5d002dad075b11.jpg) | Add to Reading ListSource URL: revwarapps.orgLanguage: English - Date: 2012-03-11 14:34:16
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