$a The atlas of finite groups / ed. by Robert Curtis and Robert Wilson. - Cambridge, cop. 1998. $b (School of Mathematics and Statistics, Univ. of Birmingham)
670
$a Kp. Graphs, colourings and the four-colour theorem /Robert A. Wilson. - Oxford, dr. 2004. $b (The University of Birmingham)
670
$a British Library online
999
$a VIRTUA10 x
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