Citations
Korean Royal Observatory, clocks and instruments - Sejong's time, 15th century, 1960 - 1989-06-30, GBR/1928/NRI/NRI2/2/4/1. Needham Research Institute. |
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Korean Royal Observatory, clocks and instruments - Sejong's time, 15th century, 1960 - 1989-06-30, GBR/1928/NRI/NRI2/2/4/1. Needham Research Institute. https://archivesearch.lib.cam.ac.uk/repositories/21/archival_objects/330079 Accessed July 01, 2024. |