Chapter member Dan Grudzielanek has compiled a comprehensive listing of railroad radio frequencies used in and around Wisconsin and Illinois (updated October 2020).
In 2000, the chapter published a special 50th anniversary edition of Sparks & Cinders (1.6 MB).
The State of Wisconsin's Office of the Commissioner of Railroads publishes a map of all railroads in the state. View/download a copy of the 2020 edition here.
The Federal Railroad Administration has an interactive map of United States railroads on its website.