@misc{1339136,
  author = {Robert R. Lipman},
  title = {STEP File Analyzer User's Guide (Version 4)},
  year = {2017},
  month = {2017-08-17 00:08:00},
  publisher = {Advanced Manufacturing Series (NIST AMS), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.AMS.200-4},
  language = {en},
}