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Source:
Science. 5/24/1991, Vol. 252 Issue 5009, p1151. 4p. 2 Charts.
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Source:
Science. 1/18/1991, Vol. 251 Issue 4991, p298. 4p. 1 Chart, 4 Graphs.
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Source:
Conservationist. Mar/Apr91, Vol. 45 Issue 5, p20. 4p. 7 Color Photographs.
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Conservationist. May/Jun91, Vol. 45 Issue 6, p26. 6p. 3 Color Photographs, 1 Black and White Photograph.
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Source:
Library Journal. 2/15/1991, Vol. 116 Issue 3, p225-225. 1/8p.
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Source:
Journal of Environmental Education. Fall1991, Vol. 23 Issue 1, p30. 0p.
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Source:
School Library Journal. May91, Vol. 37 Issue 5, p102-102. 1/6p.
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Source:
Environmental Action. Jan/Feb91, Vol. 22 Issue 4, p10. 2p.
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