The earliest electromagnetic instruments
| Main Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington,
Smithsonian Institution; [for sale by the Superintendent of Documents, U. S. Govt. Print. Off.]
1964
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| Series: | Contributions from the Museum of History and Technology,
paper 38 Bulletin (United States National Museum) ; no.240 |
| Subjects: |