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Scientific American

March 1, 1991

1 min read

Guessing Game

The EPA tries to decide if there's harm from ELF

By Tim Beardsley

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This article was originally published with the title “Guessing Game” in Scientific American Magazine Vol. 264 No. 3 (March 1991), p. 30
doi:10.1038/scientificamerican0391-30

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