@misc{indiciaeb6e81eb34a87,
  title = {Map showing morphometry, bathymetry, and soft-sediment thickness of Plow Shop Pond and Grove Pond, Ayer, Massachusetts},
  author = {A.M. Mercadante and J.A. Colman and M. L. Buursink},
  year = {1999},
  doi = {10.3133/wri994241},
  url = {https://pubs.usgs.gov/publication/wri994241},
  note = {Source identifier: wri994241}
}