Railroad Archives Online
- 宗卷D0046 - Andrew Klamka Collection
- 系列003 - Great Northern Railway Company (U.S.)
- 次系列004 - Library
- 002 - Periodicals
- 44 more...
- 物件GNSemaphoreVol4No9 - 'Great Northern Semaphore' September 1927
- 物件GNSemaphoreVol4No10 - 'Great Northern Semaphore' October 1927
- 物件GNSemaphoreVol4No11 - 'Great Northern Semaphore' November 1927
- 物件GNSemaphoreVol4No12 - 'Great Northern Semaphore' December 1927
- 物件GNSemaphoreVol5No1 - 'Great Northern Semaphore' January 1928
- 物件GNSemaphoreVol5No2 - 'Great Northern Semaphore' February 1928
- 物件GNSemaphoreVol5No3 - 'Great Northern Semaphore' March 1928
- 物件GNSemaphoreVol5No4 - 'Great Northern Semaphore' April 1928
- 物件GNSemaphoreVol5No5 - 'Great Northern Semaphore' May 1928
- 7 more...