Soo Line Railroad Company
Public Timetable Dated October 30, 1966
This was the last timetable issued by the Soo Line prior to discontinuance of almost all passenger services in March 1967. The exception, of course, were the caboose rides offered in rural eastern Wisconsin and the Upper Peninsula of Michigan until the mid-1980s, but no public timetables were printed for these (to my knowledge). As it was the last Soo timetable, there isn't much information.
Cover and Schedule for the Winnipeger
Inside-Condensed Schedule to Western Canada, Schedule Chicago-Calumet and Enderlin-Portal