@misc{indiciae08e152dcfe82,
  title = {Geology of Keweenawan Supergroup Rocks near the Porcupine Mountains, Ontonagon and Gogebic Counties, Michigan},
  author = {William F. Cannon and Suzanne W. Nicholson and Cheryl A. Hedgman and Laurel G. Woodruff and Klaus J. Schul},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/70104183},
  note = {Source identifier: 70104183}
}