@misc{indiciae617cb76b533e,
  title = {Polychart contour plotter enables data extrapolation from multiple plotting charts},
  author = {Swindall, P. M. and Wise, T. E.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19640000091},
  note = {Source identifier: 19640000091}
}