ACOUSTIC VELOCITIES IN ICE Ih, II, III, V AND VI, BY BRILLOUIN SPECTROSCOPY R. E. GAGNON, H. KIEFTE, M. J. CLOUTER et E. WHALLEY J. Phys. Colloques, 48 C1 (1987) C1-29-C1-35 DOI: 10.1051/jphyscol:1987105