995 resultados para 258
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Howard W. Smith, chairman.
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Transportation Systems Center, Cambridge, Mass.
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Cover title.
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Mode of access: Internet.
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Spine title: Site 45-OK-258, Chief Joseph Dam Project.
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"30 August 1988."
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Mode of access: Internet.
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At head of title: 88th Cong., 1st sess. Committee print.
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The minor-element composition of concentric layers within a single ferromanganese nodule from the eastern North Pacific exhibits strong correlations with Fe and Mn contents but appears to be independent of pronounced mineralogic variations. On the basis of these correlations, the elemental composition of individual layers apparently is controlled by the relative contribution of two sources: seawater, and interstitial water of associated sediment. In contrast, the mineralogy of the nodule, consisting of birnessite in the outer few layers and todorokite in the inner layers, is considered to be a function of nodule diagenesis.
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Servicios registrales
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Doctrina