Four-colour problem
Ore Oystein
Four-colour problem - New York Academic Press 1977 - xv, 259p. cm. - Pure and applied mathematics; 27 .
Bibliography 249-254p
24388
Textual
Grapth theory
B44, K7
Four-colour problem - New York Academic Press 1977 - xv, 259p. cm. - Pure and applied mathematics; 27 .
Bibliography 249-254p
24388
Textual
Grapth theory
B44, K7
