@misc{indiciaec18a2d8d8647,
  title = {National Cartographic Information Center Newsletter No. 8},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1978},
  doi = {10.3133/70039216},
  url = {https://pubs.usgs.gov/publication/70039216},
  note = {Source identifier: 70039216}
}