CHARACTERISATION AND STRUCTURE OF SOME NEW SMECTIC F PHASES A. J. LEADBETTER, J. P. GAUGHAN, B. KELLY, G. W. GRAY et J. GOODBY J. Phys. Colloques, 40 C3 (1979) C3-178-C3-184 DOI: 10.1051/jphyscol:1979336