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- Photographs and documents from the collection of James Howard, a mining foreman with the Amparo Mining Company who lived in Guadalajara, Mexico and worked in the Bolaños region starting in 1889.
- Creation Date: circa 1882-1939
- The papers of Ed Fletcher a noted San Diego land developer, civic leader, and member of the California State Senate.
- Creation Date: 1870-1955, bulk 1920-1950
- A selection of documents, photos, and audio-visual materials of the nuclear physicist and inventor Leo Szilard.
- Access: Some items restricted
- Creation Date: 1898-1998