TY  - BOOK
AU  - Wilson, Robert A.
AU  - 
ED  - 
ED  - 
ED  - 
TI  - Graphs, colourings and the four-colour theorem
SN  - 9780198510628
U1  - 511.5 
PY  - 2004///
CY  - Oxford
PB  - Oxford University Press
KW  - 
ER  -