@misc{indiciae83c67b9d0f9f,
  title = {Techniques for determining areal extent of snow in the Sierra Nevada mountains using high altitude aircraft and spacecraft imagery},
  author = {D. T. Lauer and W. C. Draeger},
  year = {1974},
  url = {https://pubs.usgs.gov/publication/70231221},
  note = {Source identifier: 70231221}
}