TY - GEN AU - K. Uhlig, W. Hehn T1 - He-3/He-4 dilution refrigerator precooled by Gifford-McMahon refrigerator CY - PY - 1997 PB - T3 - Cryogenics VL - 37 UR - http://dx.doi.org/10.1016/S0011-2275(97)00026-X SN - 0011-2275