title: [Nature as a sanatorium and pedagogical place. The Waldschule and open-air schools and their development in the first half of the 20th century].
authors: TU Berlin, Fakultät I: Geisteswissenschaften, Institut für Erziehungswissenschaften. hansen.schaberg@t-online.de
authors: I
authors: I
authors: Hansen-Schaberg
mesh_terms: D000388:Air; D004501:Education, Medical / Q000266:history*; D005858:Germany; D006294:Health Resorts / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D019368:Nature