@misc{indiciae753447eee8ac,
  title = {Velocity distribution in the lower mantle.},
  author = {Cleary, J. R. and Hales, A. L. and Roberts, J. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690041513},
  note = {Source identifier: 19690041513}
}