TY  - BOOK
AU  - Grimaldi,Ralph
TI  - Discrete and combinatorial mathematics: an applied introduction 4th edition 
PY  - 2005///
CY  - [S.l.]
PB  - Addison Wesley Publishing Company
N2  - Discrete and Combinatorial Mathematics : An Applied Introduction 4TH EDITION by Ralph P. Grimaldi. Addison-Wesley Longman, Inc.,1999 (
UR  - http://www.amazon.com/exec/obidos/ASIN/B004HP1E5Y/chopaconline-20
ER  -