@misc{indiciae84daf3c23ccd,
  title = {Geologic map of the Ontonagon and part of the Wakefield 30' x 60' quadrangles, Michigan},
  author = {W.F. Cannon and S. W. Nicholson and L. G. Woodruff and C. A. Hedgman and K. J. Schulz},
  year = {1995},
  doi = {10.3133/i2499},
  url = {https://pubs.usgs.gov/publication/i2499},
  note = {Source identifier: i2499}
}