Citations
Correspondence with the Helsinki Observatory, 1960, GBR/0180/RGO 9/481. Cambridge University Library. |
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Correspondence with the Helsinki Observatory, 1960, GBR/0180/RGO 9/481. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/99996 Accessed January 20, 2025. |