@misc{1152061,
  author = {Robert R Lipman},
  title = {STEP file analyzer and viewer user guide (update 5):},
  year = {2018},
  month = {2018-06-01 04:06:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.AMS.200-6},
  language = {en},
}