Finite fields : theory, applications, and algorithms : fourth international conference on finite fields: theory, applications, and algorithms, August 12-15, 1997, University of Waterloo, Waterloo, Ontario, Canada / Ronald C. Mullin, Gary L. Mullen, editors. - Mullin, Ronald C (Ronald Cleveland), 1936-; Mullen, Gary L (Contemporary mathematics (American Mathematical Society) ;, 1999)