@misc{indiciaef053a223532c,
  title = {Surficial geology of the Ipswich quadrangle, Massachusetts},
  author = {Edward A. Sammel},
  year = {1963},
  doi = {10.3133/gq189},
  url = {https://pubs.usgs.gov/publication/gq189},
  note = {Source identifier: gq189}
}