Railroad Archives Online
- CollectionD0046 - Andrew Klamka Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1004 - Library
- Subseries Level 2002 - Periodicals
- 8 more...
- ItemGNSemaphoreVol1No9 - Great Northern Railway Club 'THE SEMAPHORE', September 1924
- ItemGNSemaphoreVol1No10 - Great Northern Railway Club 'THE SEMAPHORE', October 1924
- ItemGNSemaphoreVol1No11 - Great Northern Railway Club 'THE SEMAPHORE', November 1924
- ItemGNSemaphoreVol1No12 - Great Northern Railway Club 'THE SEMAPHORE', December 1924
- ItemGNSemaphoreVol2No1 - 'Great Northern Semaphore' January 1925
- ItemGNSemaphoreVol2No2 - 'Great Northern Semaphore' February 1925
- ItemGNSemaphoreVol2No3 - 'Great Northern Semaphore' March 1925
- ItemGNSemaphoreVol2No4 - 'Great Northern Semaphore' April 1925
- ItemGNSemaphoreVol2No5 - 'Great Northern Semaphore' May 1925
- 43 more...