@misc{indiciae0594a39a4aac,
  title = {GAS LAWS HELP FIND PROPELLANT MASS AT ZERO G},
  author = {Evans, R. L. and Olivier, J. R.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630022003},
  note = {Source identifier: 19630022003}
}