NEUTRON DIFFRACTION STUDY OF Ho25-Dy75 AND Ho50-Dy50 IN AN EXTERNAL MAGNETIC FIELD Q. H. KHAN et W. C. KOEHLERJ. Phys. Colloques, 32 C1 (1971) C1-362-C1-364DOI: https://doi.org/10.1051/jphyscol:19711124