Ledermann, Walter. Handbook of applicable mathemathics:Volume V:Combinatorics and geometry;Part A / Edited by Walter Ledermann,Steven Vajda. - 1st ed / - New York : John Wiley & Sons. - xvii,327,xxxiiip ; ISBN: 0 471 90567 4 Subjects--Topical Terms: Mathematices Dewey Class. No.: B / M0.5-A