James R. Karr

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Entering the Watershed: A New Approach To Save America's River Ecosystems
Doppelt, Robert; Scurlock, Mary; Frissell, Chris; Karr, James R.

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US$ 5.99

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Restoring Life in Running Waters: Better Biological Monitoring
Karr, James R.; Chu, Ellen W

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US$ 8.64

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