Chen, Chuan Chong Principles and techniques in combinatorics/ Chen Chuan-Chong and Koh Khee-Meng. - Singapore: River Edge, NJ: World Scientific, c1992. - xii, 298 p.: ill.; 22 cm. Includes bibliographical references and index. ISBN: 9810211147 Subjects--Topical Terms: Combinatorial analysis. Dewey Class. No.: 511.5 / C518p