About MARUMO KATSUMI
About 産業技術総合研
About EBASHI TOSHIOMI
About ドリコ
About UJIIE TOORU
About 国土防災技術
About soil pollution
About toxic metal
About Heavy metals and their compounds in general
About Economic geology in general
About Geochemistry of lithosphere in general
About 日本
About 土壌
About 鉛同位体組成