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Books about Okinaga:
Teikyō Daigaku Ga Sekai No Topputen Ni Naruhi: Daremo Kakanakatta Okinaga Sōichi No Jitsuzō by Crane ? Yasuo (0010)
Materials Science and Engineering Serving Society by R.P.H. Chang, R. Roy, M. Doyama and S. Somiya (Jan 6, 1999)
Nihon kodai kokka no seiritsu to Okinaga-shi (Kodaishi kenkyu sensho) (Japanese Edition) by Nobuya Ohashi