@misc{1171266,
  author = {Raymond Davis and Jr. Walters},
  title = {A proposed atlas of photographic negative emulsions:},
  year = {1920},
  month = {1920-09-01 04:09:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.PC.1},
  language = {en},
}