@misc{indiciae89ad5ba0750c,
  title = {Oblique map of Yosemite Valley, Yosemite National Park, central Sierra Nevada, California},
  author = {T. R. Alpha},
  year = {1991},
  doi = {10.3133/i2149},
  url = {https://pubs.usgs.gov/publication/i2149},
  note = {Source identifier: i2149}
}