The four-color problem :
Saaty, Thomas L.
The four-color problem : assaults and conquest / Thomas L. Saaty and Paul C. Kainen. - New York : McGraw-Hill International Book Co., c1977. - ix, 217 p. : ill. ; 25 cm.
Includes index.
Includes Bibliography: p. 197-211.
0070543828
77030088
Four-color problem.
511.5
The four-color problem : assaults and conquest / Thomas L. Saaty and Paul C. Kainen. - New York : McGraw-Hill International Book Co., c1977. - ix, 217 p. : ill. ; 25 cm.
Includes index.
Includes Bibliography: p. 197-211.
0070543828
77030088
Four-color problem.
511.5