@misc{indiciae4796c515ae4c,
  title = {The information systems heritage},
  author = {Kurzhals, P. R. and Bricker, R. W. and Jensen, A. S. and Smith, A. T.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810048508},
  note = {Source identifier: 19810048508}
}