@misc{1172151,
  author = {Irvine C Gardner},
  title = {Charts for testing lens resolution/:},
  year = {1940},
  month = {1940-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.MP.166},
  language = {en},
}