TY  - BOOK
AU  - Allenby, R. B. J. T. ,
AU  - Slomson, A. B.,
TI  - How to count : an introduction to combinatorics
T2  - Discrete mathematics and its applications
SN  - 9781420082609
U1  - 511.6  ALL 
PY  - 2011///
CY  - Boca Raton
PB  - CRC Press
KW  - General principles of mathematics
KW  - Combinatorial analysis
N1  - Includes bibliographical references and index.
ER  -