Yen, John. Fuzzy logic : intelligence, control, and information / John Yen and Reza Langari. - New Delhi : Pearson education, c1999 [Reprinted 2006]. - 530 pages : illustrations ; 24 cm. Includes index. ISBN: 813170534X Subjects--Topical Terms: Fuzzy logic. Dewey Class. No.: 511.3 YEN