ELECTRON DIFFRACTION AND MICROSCOPY OF INCOMMENSURATE PHASES AND QUASI-CRYSTALS J. W. STEEDS, R. AYER, Y. P. LIN et R. VINCENTJ. Phys. Colloques, 47 C3 (1986) C3-437-C3-446DOI: https://doi.org/10.1051/jphyscol:1986344