Introduction to combinatorics / Walter D. Wallis, Southern Illinois University, Carbondale, USA, John C. George, Gordon College, Barnesville, Georgia, . Wallis, W. D.. author. George, J. C. (John Clay), 1959- author. Combinatorics Combinatorial analysis Textbooks. QA164 .W35 2017 511/.6 WAI 23 "A Chapman & Hall book." Includes bibliographical references and index. 2017 Text xix, 423 p : eng Discrete mathematics and its applications