@misc{indiciaec043011f68aa,
  title = {PCSYS: The optimal design integration system picture drawing system with hidden line algorithm capability for aerospace vehicle configurations},
  author = {Hague, D. S. and Vanderburg, J. D.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780004751},
  note = {Source identifier: 19780004751}
}