Pedrycz, Witold. An introduction to fuzzy sets : analysis and design / Witold Pedrycz and Fernando Gomide. - New Delhi : Prentice Hall, c1998 [Reprinted 2004]. - xxiv, 465 pages : illustrations ; 26 cm. Includes bibliographical references and index. ISBN: 812032465x Subjects--Topical Terms: Fuzzy sets. Dewey Class. No.: 006.30151132 PED