M0014866: Photograph of an early triode valve
- Date:
- August 1956
- Reference:
- WT/D/1/20/1/132/94
Licence: In copyright
Credit: M0014866: Photograph of an early triode valve. Source: Wellcome Collection.
Licence: In copyright
Credit: M0014866: Photograph of an early triode valve. Source: Wellcome Collection.
