@misc{indiciae6ed8380e9f2f,
  title = {A graphical summary of dissolved-oxygen data for the Delaware River Estuary for water years 1965-1969},
  author = {C.F. Merk},
  year = {1970},
  doi = {10.3133/ofr70223},
  url = {https://pubs.usgs.gov/publication/ofr70223},
  note = {Source identifier: ofr70223}
}