How to count : an introduction to combinatorics /
R.B.J.T. Allenby, Alan Slomson.
- 2nd ed.
- Boca Raton, FL : CRC Press, c2011.
- xv, 430 p. : ill. ; 27 cm.
- Discrete mathematics and its applications .
- Discrete mathematics and its applications. .
First published as: an introduction to combinatorics, 1991.