DIELECTRIC AND OPTICAL PROPERTIES IN ALKALI HALIDES DOPED WITH COBALT R. CAPPELLETTI, R. FIESCHI, G. MARTEGANI et L. PIROLAJ. Phys. Colloques, 28 C4 (1967) C4-130-C4-134DOI: https://doi.org/10.1051/jphyscol:1967421