@misc{1172406,
  author = {Mary Elizabeth Stevens},
  title = {Automatic indexing ::a state-of-the-art report},
  year = {1970},
  month = {1970-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.MONO.91e1970},
  language = {en},
}