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The full report of the National Academy of Science (nearly 300 pages) is available free as a PDF file by registering at
<http://www.nap.edu/catalog.php?record_id=13266>.
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The full report of the National Academy of Science (nearly 300 pages) is available free as a PDF file by registering at
<http://www.nap.edu/catalog.php?record_id=13266>.