Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Workman, D. R. (David Richard)","Mineral resources of the Lower Mekong Basin and adjacent areas of Khmer Republic, Laos, Thailand and Republic of Viet-Nam",,United Nations,1972,Document,,,,https://cir.nii.ac.jp/crid/1130000797122413440