@misc{indiciaea2b0ba6c164d,
  title = {A method for designing film transfer functions for use in an image processing laboratory},
  author = {J. S. Duval},
  year = {1982},
  doi = {10.3133/ofr82705},
  url = {https://pubs.usgs.gov/publication/ofr82705},
  note = {Source identifier: ofr82705}
}