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Source:
Science News. 10/25/1980, Vol. 118 Issue 17, p266-266. 1/4p.
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Source:
Science News. 1/26/1980, Vol. 117 Issue 4, p56-56. 1/6p.
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Source:
American Journal of Public Health. May80, Vol. 70 Issue 5, p492. 6p.
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