@misc{indiciaea744691eab4f,
  title = {Lunar surface engineering properties experiment definition. Volume 3: Borehole probes},
  author = {Goodman, R. E. and Drozd, K. and Chirapuntu, S. and Hovland, H. J. and Van, T. K.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720006168},
  note = {Source identifier: 19720006168}
}