@misc{125851,
  author = {E Early and Thomas O'Brian and Robert Saunders and Albert Parr},
  title = {Film Step Tablet Standards of Diffuse Visual Transmission Density-SRM 1001 and SRM 1008},
  year = {1998},
  month = {1998-01-01},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}