A He-3 DILUTION REFRIGERATOR FOR NEUTRON DIFFRACTION STUDY OF NUCLEAR ANTIFERROMAGNETIC ORDER P. Roubeau, Y. Roinel, V. Bouffard and O. Avenel J. Phys. Colloques, 39 C6 (1978) C6-1146-C6-1147 DOI: 10.1051/jphyscol:19786507