@misc{indiciaea502a1ff92c9,
  title = {Bedrock geologic map of the Ashland and the northern part of the Ironwood 30- x 60-minute quadrangles, Wisconsin and Michigan},
  author = {W.F. Cannon and L. G. Woodruff and S. W. Nicholson and C. A. Hedgman},
  year = {1996},
  doi = {10.3133/i2566},
  url = {https://pubs.usgs.gov/publication/i2566},
  note = {Source identifier: i2566}
}