@misc{indiciaef19b4ed350b7,
  title = {Hydrologic data of the lower Merrimack River basin, Massachusetts, from Concord River, Lowell, to Plum Island, Newburyport},
  author = {David F. Delaney and Frederick B. Gay},
  year = {1981},
  doi = {10.3133/ofr811185},
  url = {https://pubs.usgs.gov/publication/ofr811185},
  note = {Source identifier: ofr811185}
}