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BJL CLASSMARK
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Four Colour Problem
1
Mark
Every planar map is four colorable
Appel, Kenneth I., 1932-2013.
Providence, R.I. : American Mathematical Society, c1989.
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c1989
EBOOKS
2
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Four colours suffice : how the map problem was solved.
Wilson, Robin J., 1943-
London : Penguin, 2003.
2003
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BJL 3rd Floor
QA 612.19 W7
8 WEEK LOAN
AVAILABLE