Chowdhary, K R. Fundamentals of discrete mathematical structures / by K R Chowdhary. - 2nd ed / . - New Delhi : PHI Learning , 2008. - 273p. : figures ; 23cm . Includes index ISBN: 9788120333321 RS250.00 Subjects--Index Terms: MATHEMATICAL STRUCTURE Dewey Class. No.: 511 / CHO/F