@misc{1150256,
  author = {Stephen Nowland Clark},
  title = {NIST STEP working form programmer's reference:},
  year = {1990},
  month = {1990-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.4353},
  language = {en},
}