Trenching for the concrete sleepers which cae the track rails
1956 December 22
- Title
- Trenching for the concrete sleepers which cae the track rails
- Collection
- Caltech Photographs
- Series
- Photographs of Academic Divisions and Departments
- Sub-Series
- Astronomy (Astrophysics)
- Dates
- 1956 December 22
- Extents
- 1 photographs