TY  - BOOK
AU  - Wilson, Robin J
AU  - Watkins,John J
TI  - Graphs: an introductory approach 
SN  - 0471615544
PY  - 1990///
CY  - New York
PB  - Wiley
KW  - Graph theory
N1  - "Based on the Open University course, Graphs, networks, and design"; Includes index; Bibliography: p. 300-302
ER  -