Pouring concrete “mirror”
1940 May 19
- Title
- Pouring concrete “mirror”
- Collection
- Caltech Images Collection
- Series
- Academic Divisions and Departments
- Sub-Series
- Astronomy (Astrophysics)
- Identifier
- 10.22.4-6
- Dates
- 1940 May 19
- Extents
- 1 photographs
1940 May 19