About ISHIHARA Shunso
About ORIHASHI Yuji
About Univ. Tokyo
About 地質調査研究報告
About Triassic Period
About Socialist Republic of Viet Nam
About granitic rocks
About uranium-thorium-lead dating
About zircon
About tin deposit
About metalliferous deposit
About mineralization
About rare earth element
About tungsten deposit
About Dating
About ベトナム
About 三畳紀
About 花崗岩類
About ジルコンU-Pb年代