ELASTIC CONSTANTS OF ICE Ih, UP TO 2.8 KBAR, BY BRILLOUIN SPECTROSCOPY R.E. GAGNON, H. KIEFTE, M.J. CLOUTER and E. WHALLEY J. Phys. Colloques, 48 C1 (1987) C1-23-C1-28 DOI: 10.1051/jphyscol:1987104