Allenby R B J T How to count An introduction to combinatorics. - 2 - Boca Raton CRC Press 2010 - xv,430p. cm. ISBN: 2731.6693 Standard No.: 112851 Source: 53, 27/10/2011, Aviva Books Company Textual Subjects--Topical Terms: Mathematics Dewey Class. No.: B217, Q1