@misc{indiciae6301a3e05cf2,
  title = {Map showing unconsolidated materials, Warren quadrangle, Massachusetts},
  author = {J. S. Pomeroy},
  year = {1973},
  doi = {10.3133/mf541b},
  url = {https://pubs.usgs.gov/publication/mf541B},
  note = {Source identifier: mf541B}
}