@misc {TN_libero_mab2,
author = { Humboldt, Alexander von Wegener, Wilhelm G. AND Leitzmann, Albert },
title = { Jugendbriefe Alexander von Humboldts an Wilhelm Gabriel Wegener },
publisher = {Göschen},
year = {1896},
address = { Leipzig },
url = { http://slubdd.de/katalog?TN_libero_mab2 }
}
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