@misc{1152066,
  author = {Robert R Lipman},
  title = {STEP file analyzer user's guide (version 4):},
  year = {2017},
  month = {2017-08-01 04:08:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.AMS.200-4},
  language = {en},
}