@misc{indiciae9def9eaeecff,
  title = {Map showing echo-sounding survey (3.5 kHz) of Massachusetts and Cape Cod Bays, western Gulf of Maine},
  author = {B. E. Tucholke and R. N. Oldale and C. D. Hollister},
  year = {1972},
  doi = {10.3133/i716},
  url = {https://pubs.usgs.gov/publication/i716},
  note = {Source identifier: i716}
}