@proceedings {TN_libero_mab2,
author = { },
title = { National geographic research a scientific journal },
publisher = {},
isbn = {8755-724X},
keywords = { Zeitschrift , Geografie },
year = {1985-1990},
address = { Washington, DC },
url = { http://slubdd.de/katalog?TN_libero_mab2 }
}
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