Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1012 - Cartographic materials
- Subseries Level 2002 - Plats
- 1826 more...
- ItemPlat014148 - Plat Map of Northern Pacific Facilities at Perma, Montana, 1933
- ItemPlat014151 - Plat Map of Northern Pacific Facilities at Philipsburg, Montana, 1916
- ItemPlat014152 - Plat Map of Northern Pacific Facilities at Philipsburg, Montana, 1916
- ItemPlat014153 - Plat Map of Northern Pacific Facilities at Philipsburg, Montana, undated
- ItemPlat014154 - Plat Map of Northern Pacific Facilities at Philipsburg, Montana, undated
- ItemPlat014155 - Plat Map of Northern Pacific Facilities at Phosphate, Montana, undated
- ItemPlat014156 - Plat Map of Northern Pacific Facilities at Phosphate, Montana, 1953
- ItemPlat014157 - Plat Map of Northern Pacific Facilities at Phosphate, Montana, 1953
- ItemPlat014158 - Plat Map of Northern Pacific Facilities at Phosphate, Montana, 1955