863 resultados para half-life value of Pa-239
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Mode of access: Internet.
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Mode of access: Internet.
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Microfilm. Ann Arbor, Mich., University Microfilms [n.d.] (American culture series, Reel 235.2)
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Bound with the author's Grace Darling. London [188-?]
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Mode of access: Internet.
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At head of title: Unpublished.
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Mode of access: Internet.
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Mode of access: Internet.