proceedings of the Warsaw Fall Seminars Seminars in mathematical economics, Polish Academy of Sciences, Warsaw, 1975 creator Los, M. W. ; ed. Wieczorek, A. ; jt. ed. Los, J. ; jt. ed. text Berlin Springer-Verlag 1976 monographic 159p. Ed. by M. W. Los, J. Los, and A. Wieczorek (Lecture notes in Economics and Mathematical systems ; 133- Mathematical Economics) 330.1543 Se471.ME