@misc{indiciae6f109fbb2fff,
  title = {Lunar ash flows - Isothermal approximation.},
  author = {Pai, S. I. and Hsieh, T. and O'Keefe, J. A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720052360},
  note = {Source identifier: 19720052360}
}