  2010 - How to Count an Introduction to Combinatorics Second Edition [Discrete Mathematics and Its Applications] (Hardcover) ISBN-13: 9781420082609 ISBN-10: 1420082604 ?  1997 - Introduction to Combinatorics (Paperback) ISBN-13: 9780412353703 ISBN-10: 0412353709 Genres: Science & Math, Engineering & Transportation ?  1991 - An Introduction to Combinatorics [Chapman Hall/Crc Mathematics Series] (Hardcover) ISBN-13: 9780412353604 ISBN-10: 0412353601 Genre: Science & Math ? |
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