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Christian von Wistinghausen

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The Biodynamic Spray and Compost Preparations Production Methods Based on Details Given in Agriculture, a Course of 8 Lectures Held by Rudolf Steiner in Koberwitz, Nr Wraclaw (Breslau) in 1924 and on Practical Experience with the Preparations from 1924 to 1998
Christian von Wistinghausen — Books & Biography | Menrva Books