U.S. Department of Health & Human Services

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Start Over You searched for: Subjects Water Purification -- standards โœ–Remove constraint Subjects: Water Purification -- standards Subjects Water Pollution -- prevention & control โœ–Remove constraint Subjects: Water Pollution -- prevention & control
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1. Efficiency of standard Army water purification equipment and of diatomite filters in removing cysts of Endamoeba histolytica from water: for official action