How to count : an introduction to combinatorics /
R. B. J. T. Allenby, Alan, Slomson.
- 2nd ed.
- Boca Raton : CRC Press, c2011.
- xv, 430 p. : ill. ; 26 cm.
- Discrete mathematics and its applications. .
"A CRC title." First published as: an introduction to combinatorics, 1991. Includes bibliographical references and index.