Moody's Manual of Public Utilities
| Year | Company Map (PDF ~1MB@) |
| 1913 | West Penn Traction |
| 1914 | Chicago Railways Interborough Rapid Transit (NY) New York Municipal Railway Pittsburgh Railways United Light & Railways |
| 1917 | Cleveland Railway New York State Railways Republic Railway & Light (Penn-Ohio) West Penn System |
| 1918 | Pennsylvania-Ohio Power & Light |
| 1921 | Cleveland Railway |
| 1923 | American Waterworks and Electric (West Penn) Connecticut Company System Penn Public Service Republic Railway & Light (Penn-Ohio) Third Avenue Railway (NY) |
| 1924 | Penn Pubic System |
| Moody's does not appear to have renewed the copyright on their Manuals until issues pubished in the second half of the 20th Century. Search Stanford Copyright Renewal Database. | |
| The maps have been scanned at a higher resolution than is available with complete book scans available from other sources. Search archive.org, HathiTrust and Google Books. | |
Courtesy Cleveland Public Library