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札幌試験場視察 [Visit to Sapporo Proving Ground] (PDF). Electronic Equipment Research Institute / Advanced Technology Promotion Center Headquarters Kobo [newsletter] (in Japanese). No. 503. General Affairs Division, General Affairs Department, Technology Research Headquarters, Ministry of Defense. 8 March 2010. p. 2. Archived from the original(PDF) on 8 March 2016.
"Niijima". Encyclopedia Astronautica. Archived from the original on 21 November 2019.