@misc{indiciae58e616dcac5f,
  title = {User Manual for the Data-Series Interface of the Gr Application Software},
  author = {John M. Donovan},
  year = {2009},
  doi = {10.3133/ofr20091181},
  url = {https://pubs.usgs.gov/publication/ofr20091181},
  note = {Source identifier: ofr20091181}
}