The four-color problem /
Ore, Oystein, 1899-1968
The four-color problem / Oystein Ore - New York : Academic Press, 1967 - 259 p. : ill. ; 24 cm. - Pure and applied mathematics 27 .
Includes index
Bibliography:p.249-253
0125281501
66-30095
Four--color problem
The four-color problem / Oystein Ore - New York : Academic Press, 1967 - 259 p. : ill. ; 24 cm. - Pure and applied mathematics 27 .
Includes index
Bibliography:p.249-253
0125281501
66-30095
Four--color problem
