Counting: The Art of Enumerative Combinatorics (Undergraduate Texts in Mathematics)
by George E. Martin
ISBN 13: 9780387952253
Format: Illustrated (268 pages) Publisher: Springer Published: 01 Jul 2001
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Transformation Geometry: An Introduction to Symmetry (Undergraduate Texts in Mathematics)
ISBN 13: 9780387906362
Format: Illustrated (252 pages) Publisher: Springer Published: 01 Jan 1997