MEASUREMENTS OF THE OPTICAL REFLECTIVITY AND MICROWAVE DIELECTRIC CONSTANT OF Na-NH3 SOLUTIONS IN THE METAL-NONMETAL TRANSITION RANGE M. SCHLAUF, G. SCHÖNHERR et R. WINTERJ. Phys. IV France, 01 C5 (1991) C5-185-C5-190DOI: https://doi.org/10.1051/jp4:1991522