@misc{indiciae2e1678cb8eec,
  title = {The tectonics of North America — A discussion to accompany the tectonic map of North America, Scale 1:5,000,000},
  author = {P. B. King},
  year = {1969},
  doi = {10.3133/pp628},
  url = {https://pubs.usgs.gov/publication/pp628},
  note = {Source identifier: pp628}
}