..............page:16-19,23
..............page:24-28,41
Analysis and Evaluation of Karstic Collapse in Laiwu City
zhang li-xia 1; xiong da-jun 1; wang ji-ning 1; fang qing-hai 1; han xiang-yin 1; fu dong-ye 2 (1.shandong monitoring center of geological environment; shandong jinan 250014; china; 2. no.1 exploration institute of geology and mineral resources
..............page:32-35,48