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Start Over Subjects Communicable Disease Control ✖Remove constraint Subjects: Communicable Disease Control Subjects United States. Public Health and Marine Hospital Service. ✖Remove constraint Subjects: United States. Public Health and Marine Hospital Service. Titles [Eight public health service workers (?) (full-length portrait, standing, facing front) holding buckets filled with rat bait (?), San Francisco, Calif.] ✖Remove constraint Titles: [Eight public health service workers (?) (full-length portrait, standing, facing front) holding buckets filled with rat bait (?), San Francisco, Calif.]

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