@misc{indiciaecb5290c9bcd2,
  title = {Scintillation Type Nuclear Densitometer, Model 143A. High Counting Rate, Scintillation Type Nuclear Densitometer, Model 143B. Evaluation of Precision Gamma Radiation Densitometer Techniques for Cryogenic Liquids},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19660006787},
  note = {Source identifier: 19660006787}
}