3 results
- Ephemera
- Online
Photomultiplier tubes / 20th Century Electronics Limited.
20th Century Electronics (Firm)Date: 1958- Ephemera
- Online
Geiger counter tubes : illustrated price list, December 1957 / 20th Century Electronics.
20th Century Electronics (Firm)Date: 1957- Archives and manuscripts
Company-wide Newsletters & Journals (internal)
Date: 1942 - 2000Reference: WF/M/PB/01Part of: Wellcome Foundation Ltd