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Thirteen Colorful Variations on Guthrie's Four-Color Conjecture - MaRDI portal

Thirteen Colorful Variations on Guthrie's Four-Color Conjecture (Q5636915)

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scientific article; zbMATH DE number 3363591
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Thirteen Colorful Variations on Guthrie's Four-Color Conjecture
scientific article; zbMATH DE number 3363591

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    Thirteen Colorful Variations on Guthrie's Four-Color Conjecture (English)
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    1972
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