Berge, Claude. Principles of combinatorics [by] C. Berge. - New York, Academic Press, 1971. - Mathematics in science and engineering ; v. 72 . Includes bibliographies. LCCN: 76127679 //r83 Subjects--Topical Terms: Combinatorial analysis. LC Class. No.: QA164 / .B4713 Dewey Class. No.: 511/.6