[Carl August Ljunggren's contribution to school hygiene].
Ljunggren
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D002669:Child Welfare / Q000266:history*; D004501:Education, Medical / Q000266:history*; D049711:History, Modern 1601-; D006920:Hygiene / Q000266:history*; D013548:Sweden
Carl August Ljunggrens skolhygieniska insats.