1. Chairman of the Working party: J. Oudar; Scientific Secretary: P. Marcus.
2. Participants: J. Castle, University of Surrey, U.K.
3. J. C. Charbonnier and H. de Rugy, IRSID, France.
4. H. J. Grabke, W. Diekmann, R. Möller and H. Streckel, Max Planck Institüt, Düsseldorf, F.R.G.
5. H. Knote, U. Roll and S. Hofmann, Max Planck Institüt, Stuttgart, F.R.G.