@misc{indiciae75b97565e12a,
  title = {Pattern recognition. v- samp - a computer program for estimating surface area from contour maps},
  author = {Monmonier, M. S. and Pfaltz, J. L. and Rosenfeld, A.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650026797},
  note = {Source identifier: 19650026797}
}