@misc{indiciae501247fbd876,
  title = {Program PDP003, CTRL2D},
  author = {M.M. Donzeau and M. E. Gettings},
  year = {1981},
  doi = {10.3133/ofr811152},
  url = {https://pubs.usgs.gov/publication/ofr811152},
  note = {Source identifier: ofr811152}
}