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classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-12month TO NOW/DAY]
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classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-month TO NOW/DAY]
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classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-18month TO NOW/DAY]
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classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-6month TO NOW/DAY]
Vom Klepper zum Schlepper : zur Entwicklung der Antriebskräfte in der Landwirtschaft