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Description George David Birkhoff (1884-1944)
Date
Source Rudolf Fritsch. Der Vierfarbensatz: Geschichte, topologische Grundlagen und Beweisidee. Mannheim: BI-Wissenschaftsverlag, 1994; S.29
Author Unknown authorUnknown author
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current19:01, 11 May 2008Thumbnail for version as of 19:01, 11 May 2008268 × 326 (9 KB)SKraemer{{Information |Description=George David Birkhoff (1884-1944) |Source= |Date=1910 |Author= |Permission= |other_versions= }}

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