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by Freund, B.
Published in Pädagogische Reform (1892)
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urn:nbn:de:0111-bbf-spo-784740
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6
by Freund, B.
Published in Pädagogische Reform (1892)
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urn:nbn:de:0111-bbf-spo-787748
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7
by Freund, B.
Published in Pädagogische Reform (1891)
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urn:nbn:de:0111-bbf-spo-810077
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8
by Freund, B.
Published in Pädagogische Reform (1891)
Volltext, Kostenfrei, Digitalisierung
urn:nbn:de:0111-bbf-spo-810313
E-Article
9
by List, P., Freund, B.
Published in Planta Medica (1968)
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10
by Freund, B., Cantow, H.-J.
Published in Polymer Bulletin (1985)
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E-Article
11
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12
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