EXPERIMENTAL CONSIDERATIONS ON PRODUCING HIGHLY POLARIZED LIQUID 3He IN A MATRIX OF SOLID 4He A.S. Greenberg, B. Hébral, M. Papoular and M.T. Béal-Monod J. Phys. Colloques, 41 C7 (1980) C7-79-C7-82 DOI: 10.1051/jphyscol:1980713