Fukyuban bakumatsu Nihon no jōhō katsudō : kaikoku no jōhōshi = Intelligence activities in the last days of the Tokugawa shogunate in Japan : the history of intelligence at the time of ̄"the opening of Japan to the world" / Iwashita Tetsunori cho.
普及版幕末日本の情報活動 : 「開国」の情報史 / 岩下哲典 著.