ANISOTROPY OF MAGNETO-OPTICAL ORIENTATION EFFECT IN SINGLE CRYSTAL OF NICKEL G. S. KRINCHIK, E. A. GANSHINA and V. S. GUSHCHIN J. Phys. Colloques, 32 C1 (1971) C1-1061-C1-1063 DOI: 10.1051/jphyscol:19711381