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Biografie 1,364 Brief 204 Lehrbuch 194 Agriculture 155 Forests and forestry 120 Forestry 101 Landwirtschaft 85 more ... Geschichte 77 Gartenkunst 63 Agricultural chemistry 53 Soils 51 Botany, Economic 50 Trees 47 Hunting 46 Deutschland 44 Gardening 43 History 43 18. Jahrhundert 41 Horses 38 Nachruf 38 Dissertation 37 Fruit-culture 37 Graphik 37 Botany 35 Diseases and pests 34 Early works to 1800 32 Gardens 32 Plant diseases 30 Bee culture 29 Landscape gardening 25 less ...