Advances in Scattering Methods Proceedings of the 16th Prague IUPAC Microsymposium on Macromolecules and the 5th Prague IUPAC Discussion Conference on Macromolecules, Phases and Interfaces in Macromolecular Systems, Prague, Czechoslovakia, 12-16 July 1976, Held Under the Auspices of the International Union of Pure and Applied Chemistry, the Czechoslovak Academy of Sciences, the Czechoslovak Chemical Society