@misc{indiciae8b0e240310b0,
  title = {The employment of weather satellite imagery in an effort to identify and locate the forest-tundra ecotone in Canada},
  author = {Susan A. Aldrich and Frank T. Aldrich and Robert Dean Rudd},
  year = {1969},
  doi = {10.3133/ofr692},
  url = {https://pubs.usgs.gov/publication/ofr692},
  note = {Source identifier: ofr692}
}