Proof of the Heawood conjecture for non-orientable surfaces /

Bibliographic Details

Main Author:	Youngs, John William Theodore, 1910-
Corporate Author:	Rand Corporation
Format:	Book
Language:	English
Published:	[Santa Monica, Calif.] : [Rand Corp.], [1970]
Subjects:	Graph theory. Manifolds (Mathematics) Map-coloring problem.