Discrete mathematics / John A. Dossey ... [et al.]. Dossey, John A. Mathematics. Computer science Mathematics. QA39.2 .D57 1993 511 20 DIS Includes bibliographical (p. 516-518) references and index. Hinsdale, IL : HarperCollins, c1993. c1993. 1993 Text xiii, 555 p. : eng