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Start Over You searched for: Genre Articles Remove constraint Genre: Articles Publication Year 1969 Remove constraint Publication Year: <span class="single" data-blrl-single="1969">1969</span>

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24. Survival of Human Pathogens in Composted Sewage

25. Technology and Society: A Conflict of Interest?

26. DDT: Boon or Bane?

27. Science Has Long Known Ways to Make Subhumans

29. Food Needs Require Us to Apply Basic Biology

30. Sea-Level Canal Points Up Need for Environmental Data