Fuzzy sets : theory and applications to policy analysis and information systems / edited by Paul P. Wang and S. K. Chang. Symposium on Policy Analysis and Information Systems (1980 : Duke University) Wang, Paul P. Chang, S. K. (Shi Kuo), 1944- Fuzzy sets Congresses. Policy sciences Congresses. Social systems Congresses. System analysis Congresses. QA248 .S97 1980 511.322 19 F996 Includes bibliographies and index. New York : Plenum Press, c1980. c1980. 1980 Text ix, 412 p. : eng