Ru Chen Expert of Chinese in 30 (thirty) days - Intermediate - Beijing Sinolingua China 2007 - 173p. cm. - CL . One CD ISBN: 9787802003736 760.00 Standard No.: 45,069 Source: I/31690/13-14, 21/03/2014, GBD Books Textual Subjects--Topical Terms: CL Dewey Class. No.: P41,9, P7