TY  - BOOK
AU  - Holton, D. A.
AU  - Sheehan, J.
TI  - Petersen graph
SN  - 0-521-43594-3
U1  - 511.5 
PY  - 1993///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Four colour problem
KW  - Mathematics graph
KW  - Snarks
N1  - Includes index
ER  -