Arp, V.
, Daney, D.
, Frederick, N.
, Jones, M.
, Ludtke, P.
, Parrish, W.
and Powell, R.
(1975),
Helium research in support of superconducting power transmission:, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.IR.75-823
(Accessed January 24, 2025)