@misc{1175176,
  author = {Stephen Clark and Sanford Ressler},
  title = {The geometry modeling system user's guide:},
  year = {1987},
  month = {1987-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.87-3508},
  language = {en},
}