The four���olor problem /
Ore, Oystein, 1899-1968.
The four���olor problem / Oystein Ore. - New York : Academic Press, c1967. - xv, 259 p. : ill. ; 24 cm. - Pure and applied mathematics; a series of monographs and textbooks ; 27 .
Includes bibliography & indexes.
66030095
Applied mathematics.
Four���olor problem.
QA3 / .P8 no. 27
513.83 / ORE
The four���olor problem / Oystein Ore. - New York : Academic Press, c1967. - xv, 259 p. : ill. ; 24 cm. - Pure and applied mathematics; a series of monographs and textbooks ; 27 .
Includes bibliography & indexes.
66030095
Applied mathematics.
Four���olor problem.
QA3 / .P8 no. 27
513.83 / ORE
