(YING )YA LI SHAN DA HE QI SHEN YI books & textbook
Longman New Concept English outside the research community 2 (Student Book) (cassette version)
(YING )YA LI SHAN DA HE QI SHEN YI
Foreign Language Teaching and Research Press Pub. /1991T Paperback
isbn-10: 7560067263 / isbn-13: 9787560067261