CONDUCTION ELECTRON SPIN RESONANCE OF LITHIUM AMMONIA SOLUTIONS IN THE RANGE OF THE METAL TO NON METAL TRANSITION P. Damay, J.P. Lelieur and P. Devolder J. Phys. Colloques, 41 C8 (1980) C8-24-C8-27 DOI: 10.1051/jphyscol:1980806