..............page:11-12,21
Study on Work Method of Agricultural Eco-geological Survey
wang cong-xiang 1; yang bin 1; zhang shang-kun 1; liu shu-cai 1; yi hui 2 (1.shandong institute and laboratory of geological sciences; shandong jinan 250013; china; 2.huinan brigade of the geological exploration center of chinese construction material company; hunan zhuzhou 412000; china)
..............page:41-43