@misc{indiciae4e4096de6f08,
  title = {Use of tree aggregations in forest ecology and management},
  author = {N.L. Stephenson},
  year = {1987},
  doi = {10.1007/bf01867172},
  url = {https://pubs.usgs.gov/publication/1007706},
  note = {Source identifier: 1007706}
}