ISBN 9787807304227 books & textbook
Mathematical Olympiad Jingjiang and testing (2 year)
YAN MING YU JIN SONG WU ZHOU JIE YING XIONG BIN FENG ZHI GANG
Academia Press Pub. Date :2007-10 -01 /1991-01-01 Paperback
isbn-10: 7807304227 / isbn-13: 9787807304227
