@misc{indiciae2a47af1806a0,
  title = {An algorithm for spatial heirarchy clustering},
  author = {Dejesusparada, N. and Velasco, F. R. D.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19820012730},
  note = {Source identifier: 19820012730}
}