Four-color reducibility of planar graphs containing subgraphs with four-point boundaries
By: Norman C. Dalkey.
Series: Paper / Rand -- P-3113; P (Rand Corporation) -- P-3113.
Publisher: Rand Corp.]
Published: 1965
Place of publication: [Santa Monica, Calif
Language: eng
Subjects: Graph theory.; Four-color problem.
Notes: Cover title.

"April 1965."