Yangiusio, Kecheng Tiao Lai <br/><br/>
Biao Zhun Zhong: Textbook 3rd  level/ 
Kecheng Tiao Lai Yangiusio 
 - Beijing:  PEP,  1999. 
 - 194 p. 
<br/><br/><label>Dewey Class. No.: </label>495.1  / KEC/B