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photoprint, “stillimage”, “printsandphotographs”, pp, nationallibraryofmedicine, nlm, imagesfromthehistoryofmedicine, ihm, historyofmedicinedivision, hmd, “nationalinstitutesofhealth”, nih, water, potable, suitablefordrinking, drinkableliquids, philippineislands, sanitaryengineering, watertreatmentsystem, watersupply, sterilizingwater, drinkingbehaviorwater, watersterilization, distill, microbiology, waterdistributionsystem, waterdistillationmechanisms, publicdomain, h20, archivesofmedicine, nlmdigitalcollection
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