Shipman proof
Subtitle: the four-colour conjecture
By: William Shipman.
Publisher: Almonte Shipman Enterprises
Published: 1982
Place of publication: [Scarborough, Ont
Language: eng
Number of pages: 15
Subjects: Four-color problem.; Graph theory.
Other titles: Four-colour conjecture
Notes: Errata slip inserted.

Accompanied by related materials (9 leaves) in pocket.

Includes bibliographical references.