@misc{indiciae0a8d6e0d68e3,
  title = {Gas opacity measurements with a ballistic piston compressor},
  author = {Hammond, G. L. and Lalos, G. T.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700011138},
  note = {Source identifier: 19700011138}
}