TY - BOOK AU - Ranada,A.F. ED - International Seminar on Theoretical Physics ED - Grupo Interuniversitario de Fisica Teorica TI - Non linear problems in theoretical physics: proceedings of the IX G.I.F.T. International Seminar on Theoretical Physics, held at Jaca, Huesca (Spain), Jun 1978 SN - 3540092463 PY - 1979/// CY - Berlin PB - Springer-Verlag KW - Nonlinear theories KW - Congresses KW - Mathematical physics N1 - Includes bibliographical references ER -