@misc{indiciae1d636e86cdbd,
  title = {Report of the River Master of the Delaware River for the period December 1, 1979-November 30, 1980},
  author = {Francis T. Schaefer and Robert E. Fish},
  year = {1981},
  doi = {10.3133/ofr81810},
  url = {https://pubs.usgs.gov/publication/ofr81810},
  note = {Source identifier: ofr81810}
}