@misc{indiciaeabe07b176bed,
  title = {Lunar terrain mapping and relative roughness analysis},
  author = {Lawrence C. Rowan and John Francis McCauley and Esther A. Holm},
  year = {1969},
  doi = {10.3133/ofr69235},
  url = {https://pubs.usgs.gov/publication/ofr69235},
  note = {Source identifier: ofr69235}
}