TY - RPRT TI - Helium research in support of superconducting power transmission : annual report October 1979 - September 1980 AU - Daney, D E PY - 1981 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 81-1649 DO - 10.6028/NBS.IR.81-1649 ER -