David and Helen in China : an intermediate course = Dawei he Hailin zai Zhongguo : zhong ji Han yu jiao cai /
Zhang, Phyllis Ni,author.
Meng, Yuan-Yuan,author.
Chang, Donald K.,author.
Liu, Irene C.,author.
Subtitle on cover: An intermediate course in modern Chinese.
Parallel title and other title information in Chinese characters.
pt. I -- pt. II.