TY  - BOOK
ED  - The Open Unversity
TI  - Introduction 
SN  - 0335170552
U1  - 511.5 
CY  - Walton Hall
PB  - The Open Unversity press
KW  - combinatorics and modelling
KW  - graphs and digraphs
KW  - networks
KW  - enumeration
KW  - design
N1  - 1.1-combinatorics and modelling; 1.2-graphs and digraphs; 1.3-networks; 1.4- enumeration; 1.5-design
ER  -