@misc{indiciae54f9d414cdf5,
  title = {Anthropogenic and natural variation in ridge and slough pollen assemblages},
  author = {C.E. Bernhardt and Debra A. Willard and M. Marot and C. W. Holmes},
  year = {2004},
  doi = {10.3133/ofr20041448},
  url = {https://pubs.usgs.gov/publication/ofr20041448},
  note = {Source identifier: ofr20041448}
}