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Source:
Science. 8/20/1993, Vol. 261 Issue 5124, p1029. 4p. 1 Diagram, 1 Chart, 2 Graphs.
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U.S. News & World Report. 12/6/93, Vol. 115 Issue 22, p82. 1/5p.
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Science. 4/9/1993, Vol. 260 Issue 5105, p176. 6p. 3 Black and White Photographs, 1 Chart, 4 Graphs.
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Sierra. Nov/Dec93, Vol. 78 Issue 6, p42. 2p. 1 Color Photograph.
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Newsweek. 12/6/1993, Vol. 122 Issue 23, p10. 1/8p. 1 Color Photograph.
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Science News. 9/4/93, Vol. 144 Issue 10, p151. 1/2p.
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TIME Magazine. 3/22/1993, Vol. 141 Issue 12, p27. 1/6p.
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Mechanical Engineering. Jul1993, Vol. 115 Issue 7, p73. 3p. 2 Color Photographs.
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Source:
Science News. 1/16/93, Vol. 143 Issue 3, p44. 1/4p.
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Source:
USA Today Magazine. Aug93, Vol. 122 Issue 2579, p13. 1/2p. 1 Black and White Photograph.
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