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The third and final volume in the elementary level of the Hanyu Kouyu textbook series. We'd like to thank Robert Schuessler for providing this list.
Hanyu Kouyu Elementary Spoken Chinese 汉语囗语 3 (Extra), Second edition. Written by Dai Guifu and Li Haiyan. Published in 2005 by the Peking University Press. ISBN: 978-7301066300.