GLASS-LIKE ANOMALIES IN THE HYPERSONIC PROPERTIES OF OH- DOPED KCl CRYSTALS R. Vacher, J. Pelous, J.F. Berret et M. Schmidt J. Phys. Colloques, 43 C9 (1982) C9-517-C9-519 DOI: 10.1051/jphyscol:19829102