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Discovering Mount St. Helens
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Describes the Mount St. Helens National Volcanic Monument created for visitors viewing it to understand the effects of the eruption and scientists to study the eruption and its aftermath.
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Describes the Mount St. Helens National Volcanic Monument created for visitors viewing it to understand the effects of the eruption and scientists to study the eruption and its aftermath.
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"Describes the Mount St. Helens National Volcanic Monument created for visitors viewing it to understand the effects of the eruption and scientists to study the eruption and its aftermath."
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