Introduction to combinatorial mathematics [by] C. L. Liu. / Liu, C. L. (Chung Laung), 1934-

050 	 QA0164 L58
100 	 Liu, C. L. (Chung Laung), 1934-
245 	 Introduction to combinatorial mathematics [by] C. L. Liu.
260 	 New York, McGraw-Hill [1968]