@misc{indiciaead6677937107,
  title = {Map without title showing the railroad route to Santa Fe and San Diego; the central route through South Pass and on to San Francisco and "Puget's Sound," and connecting railroads east of the Mississippi},
  author = {miller \& co and whitney, asa},
  year = {1849},
  url = {https://www.loc.gov/item/gm71000953/},
  note = {Source identifier: gm71000953}
}