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Biografie 1,364 Brief 204 Lehrbuch 194 Agriculture 147 Forests and forestry 116 Forestry 101 Landwirtschaft 86 more ... Geschichte 77 Gartenkunst 63 Agricultural chemistry 51 Soils 51 Deutschland 44 Trees 44 18. Jahrhundert 41 Hunting 40 Botany, Economic 39 History 39 Gardening 38 Nachruf 38 Dissertation 37 Fruit-culture 37 Graphik 37 Horses 35 Diseases and pests 34 Botany 32 Gardens 31 Plant diseases 30 Bee culture 29 Early works to 1800 25 Philosophie 24 less ...