TY - RPRT TI - Helium research in support of superconducting power transmission AU - Arp, V D AU - Daney, D E AU - Frederick, N V AU - Jones, M C AU - Ludtke, P R AU - Parrish, W R AU - Powell, R L PY - 1975 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 75-823 DO - 10.6028/NBS.IR.75-823 ER -