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Nagano Mei Nagano Naganawa Maria Nagant M1895 Nagano Osami Nagano (thành phố) Naganuma Yoichi Naganuma, Hokkaidō Nagan Raya (huyện) Nagano FukaTài liệu tham khảo
WikiPedia: Nagano_Osami http://homepage2.nifty.com/nishidah/e/px36.htm#a00... http://www.time.com/time/magazine/article/0,9171,7... http://ww2db.com/person_bio.php?person_id=16 http://navalhistory.flixco.info/H/173984x19846/259... http://www.ibiblio.org/hyperwar/AAF/USSBS/IJO/IJO-... https://archive.org/details/battlehistoryofi0000du... https://archive.org/details/shatteredswordun0000pa... https://www.webcitation.org/6Cftv8JA1?url=http://h...