@misc{indiciae0d9072ca7a9d,
  title = {Plaster core washout tool},
  author = {Heisman, R. M. and Keir, A. R. and Teramura, K.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770000314},
  note = {Source identifier: 19770000314}
}