@misc{indiciae8002a72e0b09,
  title = {Paper simulation techniques in user requirements analysis for interactive computer systems},
  author = {Ramsey, H. R. and Atwood, M. E. and Willoughby, J. K.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19800039860},
  note = {Source identifier: 19800039860}
}