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| Utgitt
| Reston, VA : Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services , [2001]
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| Omfang
| v, 45 p. : ill., maps (some col.)
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| Utgave
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| Opplysninger
| Includes bibliographical references (p. 42-45).
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| Emner
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| ISBN
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