@misc{indiciaef015f6da6661,
  title = {Map of railroad line commencing at a point on the West-Philadelphia R.R. 4 miles below its junction with the Columbia R.R. \& terminating at the R.R. bridge at Gray's Ferry; showing it to be the easiest \& most economical route for avoiding the inclined plans \& approaching the city of Philadelphia; surveyed February, 1849},
  author = {west philadelphia rail road company and howell, courtland d.},
  year = {1849},
  url = {https://www.loc.gov/item/98688851/},
  note = {Source identifier: 98688851}
}