EXPERIMENTAL STUDY ON THE ELECTRIC FIELD OF DISLOCATIONS IN COLOURED ALKALI HALIDE CRYSTALS G. TURCHÁNYI, M. MÁTRAI, J. JANSZKY et I. TARJÁN J. Phys. Colloques, 34 C9 (1973) C9-261-C9-264 DOI: 10.1051/jphyscol:1973945