@misc{1147016,
  author = {Qiming Wang},
  title = {User's guide for the PHIGS Validation Tests (version 2.1):},
  year = {1994},
  month = {1994-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.5398},
  language = {en},
}