Copy of a letter from Joseph Needham to Professor Yabuuti Kiyosi [Yabuuchi Kiyoshi] of Kyoto, Japan, explaining his search for proof that I-Hsing used a magnetic needle and asking for his help to examine Japanese works, 1962-07-10 - 1962-07-31, GBR/1928/NRI/SCC2/95/4/8. The Papers and Possessions of Joseph Needham, GBR/1928/NRI/NRI2. Needham Research Institute. https://archivesearch.lib.cam.ac.uk/repositories/21/archival_objects/344987 Accessed January 02, 2025.