48-inch Schmidt--mixing concrete
1939 February 7
- Title
- 48-inch Schmidt--mixing concrete
- Collection
- Caltech Images Collection
- Series
- Academic Divisions and Departments
- Sub-Series
- Astronomy (Astrophysics)
- Identifier
- 10.22.22-23
- Dates
- 1939 February 7
- Extents
- 1 photographs