Free Download Subgroup complexes… By Stephen D. Smith Publisher American Mathematical Society 2011 ISBN 0821805010,978-0-8218-0501-5,327-327-328-3..

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Free Download Classifying spaces of sporadic groups… By David J. Benson, Stephen D. Smith Publisher American Mathematical Society 2008 ISBN 0821844741,978-0-8218-4474-8,45-1975-169-1,63-1991-113-1,94-1971-573-6..