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 2003 - Train orders
- ItemGNR_Clearance_Card_Eureka_19071024 - Great Northern Railway Clearance Card, Eureka, Montana, 1907
- ItemGNR_Train_Order_Eureka1_19071025 - Great Northern Railway Train Order, Whitefish, Montana, 1907
- ItemGNR_Train_Order_Eureka1_19071027 - Great Northern Railway Train Order, Eureka, Montana, 1907
- ItemGNR_Train_Order_Eureka1_19071028 - Great Northern Railway Train Order, Eureka, Montana, 1907
- ItemGNR_Train_Order_Eureka1_19071031 - Great Northern Railway Train Order, Eureka, Montana, 1907
- ItemGNR_Train_Order_Eureka2_19071028 - Great Northern Railway Train Order, Eureka, Montana, 1907