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Hydrology and Trophic Ecology of Walden Pond, Concord, Massaschusetts - Paul J. Friesz, John A. Colman
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 		Hydrology and Trophic Ecology of Walden Pond, Concord, Massaschusetts - Paul J. Friesz, John A. Colman
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Product Code: 228722074367

 
Water-Resources Investigations Report prepared for U.S. Dept. of the Interior, U.S. Geological Survey, 2001. A large (38 x 55 inches) full-color poster/map of Walden Pond and surrounding area with detailed Hydrology information (Ground-water contributing area, Water-level fluctuations, Water Balance) and Trophic Ecology information (Sources and amounts of plant-nutrient inputs, Plant-growth measurement and dissolved oxygen, Trophic stability).
2001. A fold-out map with extensive text.

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