Attainment of Temperatures Below 1° Absolute by Demagnetization of Gd2(SO4)3.8H2O Giauque, W. F. ; MacDougall, D. P. Abstract Publication: Physical Review Pub Date: May 1933 DOI: 10.1103/PhysRev.43.768 Bibcode: 1933PhRv...43..768G