TY - GEN AU - Kopetka, P AU - Williams, R E AU - Rowe, J M C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2006-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.7352 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2006 TI - NIST liquid hydrogen cold source: ER -