Yanjiusuo, Kecheng Jiao Lai <br/><br/>
Biao zhun zhong wen: Textbook 2nd level/ 
Kecheng Jiao Lai Yanjiusuo 
 - Beijing:  PEP, 
 - 146 p. 
<br/><br/><label>ISBN: </label>9787107128226 
<br/><br/><label>Dewey Class. No.: </label>495.1  / KEC/B