@misc{indiciaeaf06cdd92eb3,
  title = {Slush hydrogen flow characteristics and solid fraction upgrading.},
  author = {Ludtke, P. R. and Sindt, C. F.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690062637},
  note = {Source identifier: 19690062637}
}