The Thermionic Valve of Professor J. H. Fleming-a Piece of Apparatus capable of amplifying Sound, with a Demonstration to show the Possibilities of applying the Thermionic Valve to aid the Deaf.
| Autor: | Scruby R |
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| Jazyk: | angličtina |
| Zdroj: | Proceedings of the Royal Society of Medicine [Proc R Soc Med] 1922; Vol. 15 (Otol Sect), pp. 27-8. |
| Databáze: | MEDLINE |
| Externí odkaz: |
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