Environmental Science: Earth as a living Planet (3rd Edition)
by Daniel B. Botkin, Edward A. Keller
ISBN 13: 9780471321736
Format: Hardcover (736 pages) Publisher: John Wiley & Sons Published: 10 Nov 1999
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Environmental Geology
by Edward A. Keller
ISBN 13: 9780023632709
Format: Hardcover (544 pages) Publisher: Macmillan USA Published: 01 Apr 2007