TY - RPRT TI - Lambda-Point Experimant Helium Cryostat Cryoservicing, Functions, and Performance AU - Petrac, D. AU - Israelsson, U. E. AU - Luchik, T. S. PY - 1993 UR - https://ntrs.nasa.gov/citations/20060038645 ID - 20060038645 ER -