Query: Electric transformers
Smithsonian Institution Archives

Finding aid

Archives Center, National Museum of American History

Finding aid

Archives Center, National Museum of American History

Finding aid

Archives Center, National Museum of American History

Passports and Naturalization Certificate

Archives Center, National Museum of American History

Patent Materials

Smithsonian Institution Archives

Finding aid

Archives Center, National Museum of American History

Audio Signal Devices

Archives Center, National Museum of American History

Kny-Scheerer Company (New York, New York)

Smithsonian Institution Archives

Finding aid

Smithsonian Institution Archives

Finding aid

Archives Center, National Museum of American History

Walter Guyton Cady Papers

Archives of American Gardens

Newtown -- Echo Valley Garden

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