“Underground Rivers”

Via WaterWired: A draft version of the new book “Underground Rivers from the River Styx to the Rio San Buenaventura with occasional diversions” by University of New Mexico engineer Richard J. Heggen is available to download for free. For a fuller background on Heggen, go to WaterWired. To download the draft chapters, click here.

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    Emily Green by e-mail at emily.green [at] mac.com
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