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Subjects: ECOLOGY; SUMMER; EVIDENCE
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Source:
Earthwatch Institute Journal. 2004-2005 Research & Exploration, Vol. 23 Issue 2, p66-83. 18p. 36 Color Photographs, 1 Map.
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Subjects: OZONE layer
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Source:
National Wildlife. Aug/Sep92, Vol. 30 Issue 5, p30. 4p. 1 Color Photograph, 4 Illustrations.
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