Every planar map is four colorable:
Saved in:
Bibliographic Details
Main Authors: Appel, Kenneth I. 1932-2013 (Author), Haken, Wolfgang 1928-2022 (Author)
Format: Book
Language:English
Published: Providence, RI American Mathematical Society 1989
Series:Contemporary Mathematics 98
Subjects:
Physical Description:XV, 741 Seiten graph. Darst.
ISBN:0821851039

There is no print copy available.

Interlibrary loan Place Request Caution: Not in THWS collection!