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Great Northern Dispatcher's Manual Based on 1967 Consolidated Code of Operating Rules. A copy of the 1967 Consolidated Code of Operating Rules is essential to understanding the contents of this manual.

Great Northern Dispatcher's Manual Based on 1959 Consolidated Code of Operating Rules. A copy of the 1959 Consolidated Code of Operating Rules is essential to understanding the contents of this manual.

Great Northern Dispatchers' Manual Based on 1945 Consolidated Code of Operating Rules. A copy of the 1945 Consolidated Code of Operating Rules is essential to understanding the contents of this manual.