@book {TN_libero_mab2,
author = { },
title = { Hànyǔ putōnguà yǔyīn bìan zhèng Textbd. },
publisher = {Běijīng yǔyán xuéyuàn chūbǎnshè},
year = {1985},
address = { Běijīng },
url = { http://slubdd.de/katalog?TN_libero_mab2 }
}
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