Zhisheng Li Chong Wang 0002 Xing Xie Xufa Wang Wei-Ying Ma MSRA Columbus at GeoCLEF 2006. 926-929 2006 conf/clef/2006 CLEF http://dx.doi.org/10.1007/978-3-540-74999-8_118 db/conf/clef/clef2006.html#LiWXWM06