TY - RPRT TI - Cryogenic Liquid Level Sensor Apparatus and Method AU - Parker, Allen R., Jr. AU - Richards, W. Lance AU - Piazza, Anthony AU - Man, Hon Chan AU - Bakalyar, John A. PY - 2015 UR - https://ntrs.nasa.gov/citations/20150014985 ID - 20150014985 ER -