993 resultados para surface water acidification
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Cover title.
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Shipping list no.: 87-459-P.
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Report year ends Sept. 30.
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Mode of access: Internet.
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Mode of access: Internet.
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Cover title.
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"54-00438 - 555"--Cover.
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Bibliography: p. 73-76.
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Bibliography: p. 33.
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Bibliography: p. 49-50.