@misc{indiciaeaf655d6f5265,
  title = {Digital processing techniques and film density calibration for printing image data},
  author = {Pat S. Chavez and Joseph A. McSweeney and Douglas R. Binnie},
  year = {1987},
  url = {https://pubs.usgs.gov/publication/70113255},
  note = {Source identifier: 70113255}
}