NMR SPECTRA AND DOMAIN WALLS IN R2Fe14 COMPOUNDS WITH UNIAXIAL (R = La, Ce) AND PLANAR (R = Sm, Er) ANISOTROPY K. Erdmann, M. Rosenberg and K. H. J. Buschow J. Phys. Colloques, 49 C8 (1988) C8-583-C8-584 DOI: 10.1051/jphyscol:19888265