Långmark, J Adequacy of in situ glass slides and direct sand extractions to assess the microbiota within sand columns used for drinking water treatment. [electronic resource] - Canadian journal of microbiology Jul 2001 - 601-7 p. digital Publication Type: Comparative Study; Evaluation Study; Journal Article; Research Support, Non-U.S. Gov't ISSN: 0008-4166 Subjects--Topical Terms: Bacteria--classificationBiofilmsColony Count, MicrobialFiltration--instrumentationFresh Water--microbiologyGlassIn Situ Hybridization, FluorescenceIndoles--metabolismSilicon DioxideWater PurificationWater Supply