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Kenneth Appel
title
ISBN-13
(ISBN-10)
year of publica-
tion
other author(s)
Every Planar Map Is Four Colorable
978-O-8218-51O3-6
(O-8218-51O3-9)
1989
Wolfgang Haken
k.A.
·
Kenneth A.
·
Kenneth I. Appel
·
Kenneth J. Appel
Kenneth Appelbaum MD