@misc{indiciaeaae327475d32,
  title = {Map of Philadelphia showing population in year 1920, as enumerated in U.S. Census, and existing electric railway system},
  author = {philadelphia. department of city transit},
  year = {1921},
  url = {https://www.loc.gov/item/78694427/},
  note = {Source identifier: 78694427}
}