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About the author
伊藤秀美：1950年生．1973年東北大理学部物理学科卒、1978年京都大理学研究科物理学専攻中退．防災関係の仕事の傍ら戦史を研究．旧陸軍の暗号関係を中心に著述．
保坂廣志：1949年生．1974年東洋大社会学応用社会学科卒．琉球大学大学法文学部教授を経て現在翻訳業．沖縄戦関係の著述多数．
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