Books

1. Wir haben es gewagt: Lebensbericht eines Pioniers der biologisch-dynamischen Wirtschaftsweise
   

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2. Conservation Tillage in U.S. Agriculture: Environmental, Economic, and Policy Issues
   

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3. Opportunities in Basic Soil Science Research
   

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4. Productive farming,
   

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5. The Cotton Industry (Shire Albums)
   

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Books