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Source:
Environment. Oct90, Vol. 32 Issue 8, p16-20. 5p. 8 Black and White Photographs, 1 Map.
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Source:
Environment. Oct90, Vol. 32 Issue 8, p4-9. 6p. 5 Black and White Photographs, 1 Chart, 2 Maps.
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Source:
National Parks. May/Jun90, Vol. 64 Issue 5/6, p18. 7p. 7 Color Photographs.
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Natural History. Sep90, Vol. 99 Issue 9, p6. 10p. 2 Color Photographs, 3 Black and White Photographs, 1 Diagram, 2 Maps.
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Environment. Jul/Aug90, Vol. 32 Issue 6, p23-24. 2p.
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Futurist. Jul/Aug90, Vol. 24 Issue 4, p54-55. 2p.
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Source:
Earth Island Journal. Fall90, Vol. 5 Issue 4, p15. 1p. 2 Black and White Photographs.
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