@misc{indiciae5a670f4513f5,
  title = {The 25-km discontinuity - Implications for lunar history.},
  author = {Simmons, G. and Todd, T. and Wang, H.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730059668},
  note = {Source identifier: 19730059668}
}