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Science 7 January 1977:
Vol. 195. no. 4273, p. 6
DOI: 10.1126/science.195.4273.6-d
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Erratum

In the letter from Martin M. Barnes (3 Dec. 1976, p. 998), the first citation in reference 1 should have been J. Swarz, "Poisoning farmworkers," Environment 17 (No. 4), 26 (1975).

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