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Ramseier, Christoph A; Leiggener, Isabelle; Lang, Niklaus P; Bagramian, Robert A; Inglehart, Marita R (2007). Short-term effects of hygiene education for preschool (kindergarten) children: a clinical study. Oral health & preventive dentistry, 5(1), pp. 19-24. Berlin: Quintessenz Verlags-GmbH
