Railroad Archives Online
- FondoE0477 - BNSF Maps, Drawings and Records Collection
- Serie003 - Great Northern Railway Company (U.S.)
- Sottoserie009 - Engineering Records
- 004 - Maintenance of Way support
- 11 in più...
- Unità documentariaEBP4202 - Great Northern Structure Technical Drawing, 1904
- Unità documentariaEBP4206 - Great Northern Structure Technical Drawing, 1949
- Unità documentariaEBP4209 - Great Northern Structure Technical Drawing, 1925
- Unità documentariaEBP4210 - Great Northern Structure Technical Drawing, 1914
- Unità documentariaEBP4211 - Great Northern Structure Technical Drawing, 1925
- Unità documentariaEBP4213 - Great Northern Structure Technical Drawing, undated