School Teaching in Germany Between Tradition and Innovation: The Concept of the Outdoor School
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1994 ◽
Vol 58
(11)
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pp. 822-831
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1966 ◽
Vol 93
(5)
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pp. 522-529
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2017 ◽
Vol 6
(1)
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pp. 15
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1974 ◽
Vol 30
(2)
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pp. 104-107
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