Citations
Diagrams of the drive system of the Photographic Zenith Tube (PZT), together with a 'Brief description of the PZT time equipment, undated [c.1955-1984], GBR/0180/RGO 43/196, Box 20: RGO 43/187-200: Series GBR/0180/RGO 43. Cambridge University Library. |
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Diagrams of the drive system of the Photographic Zenith Tube (PZT), together with a 'Brief description of the PZT time equipment, undated [c.1955-1984], GBR/0180/RGO 43/196, Box 20: RGO 43/187-200: Series GBR/0180/RGO 43. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/2038338 Accessed May 19, 2025. |