MAGNETO-OPTICAL INVESTIGATION OF ELECTRON TRANSITIONS IN Ga, In AND Sc SUBSTITUTED YIG P. A. Markovin, P. Paroli, R. V. Pisarev and A. Tucciarone J. Phys. Colloques, 49 C8 (1988) C8-963-C8-964 DOI: 10.1051/jphyscol:19888440