@misc{indiciae97a699e99576,
  title = {Color variations within glacial till, east-central North Dakota--A preliminary investigation},
  author = {T. E. Kelly and Claud H. Baker},
  year = {1966},
  doi = {10.1306/74d7140b-2b21-11d7-8648000102c1865d},
  url = {https://pubs.usgs.gov/publication/70195943},
  note = {Source identifier: 70195943}
}