Railroad Archives Online
- CollectionE0480 - Great Northern Railway Historical Society Miscellaneous Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1013 - Operations documents
- Subseries Level 2001 - Rule Books
- Itemccor_1967 - Consolidated Code of Operating Rules of 1967
- GNDispatchersManual1945 - Great Northern Dispatchers' Manual Based on 1945 Consolidated Code of Operating Rules for 1945
- GNDispatchersManual1959 - Great Northern Dispatcher's Manual Based on 1959 Consolidated Code of Operating Rules for 1959
- GNDispatchersManual1967 - Great Northern Dispatcher's Manual Based on 1967 Consolidated Code of Operating Rules for 1967