International program committee

INTERNATIONAL PROGRAM COMMITTEE (appointed in agreement with the I U P A P Commission on Magnetism) A. ABRAGAM, France J. ALS-NIELSEN, Denmark P.W. ANDERSON, U.S.A. A. ARROTI', Canada A.S. BOROVIK-ROMANOV, U.S.S.R. S. CHIKAZUMI, Japan B.R. COLES, U.K. I.E. DZYALOSHINSKII, U.S.S.R. R.J. ELIOTI', U.K. M.E. FISHER, U.S.A. J. FRIEDEL, France G. GRONER, Hungary S. HUFNER, West Germany

V. JACCARINO, U.S.A. J. KANAMORI, Japan S. KRUPI(~KA, Czechoslovakia S. METHFESSEL, West Germany T. MORIYA, Japan R. PAUTHENET, France T. RISTE, Norway S. SHTRIKMAN, Israel J.C. SLONCZEWSKI, U.S.A. S.V. VONSOVSKY, U.S.S.R. P. WACHTER, Switzerland R.E. WATSON, U.S.A. E.P. WOHLFARTH, U.K.

LOCAL P R O G R A M C O M M I T T E E P.F. DE CHATEL, Amsterdam (secretary) U. ENZ, Eindhoven C. HAAS, Groningen

L.J. DE JONGH, Leiden A.R. MIEDEMA, Eindhoven (chairman) E. MOLLERoHARTMANN, K61n, West Germany

MANAGEMENT C O M M I T T E E F.R. DE BOER, Amsterdam P.F. DE CH~,TEL, Amsterdam J.J.M. FRANSE, Amsterdam C. HAAS, Groningen W.J. HUISKAMP, Leiden J. KRAGTEN, Amsterdam (treasurer) B.O. LOOPSTRA, Amsterdam

G.W. RATHENAU, Eindhoven (president) C.J. SCHINKEL, Amsterdam (secretary) I.F. SILVERA, Amsterdam R.P. VAN STAPELE, Eindhoven G. DE VRIES, Amsterdam (chairman) H.W. DE WLIN, Utrecht F. VAN DER WOUDE, Groningen

SUPPORTING ORGANIZATIONS The Management Committee acknowledges the valuable support of and fruitful cooperation with: International Union of Pure and Applied Physics (IUPAP) Royal Netherlands Chemical Society (KNCV) Stichting Physica Dutch Physical Society (NNV) Netherlands Ministry of Education and Sciences Municipality of Amsterdam University of Amsterdam Algemene Bank Neder|and N.V. Frans Hals Museum Heineken Beer

IBM Nederland N.V. N.V. tot Keuring van Elektrotechnische Materialen (KEMA) KLM Royal Dutch Airlines N.V. Magazijn de Bijenkorf Museum of the History of Science, Leiden Museum of the University of Utrecht North-Holland Publishing Company N.V. Philips Gloeilampenfabrieken The Municipal Congress Bureau of Amsterdam The staff of the International Congress Centre RAI, Amsterdam