@misc{indiciaeebb6c5919988,
  title = {Composition of till from the Clear Lake Quadrangle, Skagit and Snohomish counties, Washington},
  author = {David P. Dethier and S. A. Safioles and David R. Pevear},
  year = {1981},
  doi = {10.3133/ofr81517},
  url = {https://pubs.usgs.gov/publication/ofr81517},
  note = {Source identifier: ofr81517}
}