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keyword: Nature -- Effect of human beings on – 2 free books.

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Man and Nature; Or, Physical Geography as Modified by Human Action

George P. (George Perkins) Marsh

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Man and Nature; Or, Physical Geography as Modified by Human Action
George P. (George Perkins) Marsh
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The Earth as Modified by Human Action

George P. (George Perkins) Marsh

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The Earth as Modified by Human Action
George P. (George Perkins) Marsh
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