A MAS NMR STUDY OF THE STRUCTURE OF AMORPHOUS ALUMINA FILMS R. Dupree, I. Farnan, A.J. Forty, S. El-Mashri and L. Bottyan J. Phys. Colloques, 46 C8 (1985) C8-113-C8-117 DOI: 10.1051/jphyscol:1985814