Ore, Oystein, 1899-1968.
The four-color problem. [[Book] /] Oystein Ore. - New York : Academic Press, 1967. - xv, 259 p : illus ; 24 cm. - Pure and applied mathematics, a series of monographs and textbooks ; 27 .
Bibliography: p. 249-253.
All Ages.
Four-color problem.
513.83
/ O F
The four-color problem. [[Book] /] Oystein Ore. - New York : Academic Press, 1967. - xv, 259 p : illus ; 24 cm. - Pure and applied mathematics, a series of monographs and textbooks ; 27 .
Bibliography: p. 249-253.
All Ages.
Four-color problem.
513.83
/ O F