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https://kn.ndl.go.jp/item/genken-1001054708 SPECTROMETRIC MEASUREMENT OF URANIUM IN PLUTONIUM DIOXIDE. - 国立国会図書館東日本大震災アーカイブ 日本原子力研究開発機構図書館蔵書 KOSKI, N.L.(et al.)/1974 plutonium dioxidespectrometricmeasurementuranium https://store.astm.org/c0757-16.html C757 Standard Specification for Nuclear-Grade Plutonium Dioxide Powder for Light Water Reactors light water reactorsnuclear gradeplutonium dioxidestandardspecification