History
The History of Mackinaw Depot:
http://www.mackinawillinois.org/depot.html
The Illinois Terminal Railroad:
https://mchistory.org/research/illinois-terminal-raiload/index.php
Illinois Traction System - Mackinaw Depot Wiki:
https://en.wikipedia.org/wiki/Illinois_Traction_System_Mackinaw_Depot
National Register of Historic Places Nomination Form:
https://web.archive.org/web/20160304122417/http://gis.hpa.state.il.us/pdfs/200107.pdf
Illinois Traction Society:
http://www.illinoistractionsociety.org/