@misc{indiciaeaacdba2a56ce,
  title = {An optical method for determining level in two-phase cryogenic fluids},
  author = {Oberle, Lawrence G. and Weikle, Donald H.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920006148},
  note = {Source identifier: 19920006148}
}