---
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contributors:
  - display_name: 'Author : Alan H. Welch (US Geological Survey Water Resources Division) '
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    organization_identifier: us-geological-survey-water-resources-division
    person_id: 10928
    publications:
      - display_name: 'Arsenic in ground water of the United States: Occurrence and geochemistry'
        uri: /article/10.1111/j.1745-6584.2000.tb00251.x
    role_type_identifier: author
display_name: Alan H. Welch
first_name: Alan H.
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