@misc{indiciae67f890323582,
  title = {Potential preservation of native American petroglyphs at Steamboat Butte, Montana, using ethyl silicate solution treatments},
  author = {D.A. Grisafe},
  year = {2017},
  doi = {10.1080/2052546.2002.11932112},
  url = {https://pubs.usgs.gov/publication/70035503},
  note = {Source identifier: 70035503}
}