著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL United Nations. Economic Commission for Asia and the Far East and United Nations. Dept. of Economic and Social Affairs,"Lignite resources of Asia and the Far East, their exploration, exploitation and utilization",,United Nations. Dept. of Economic and Social Affairs,1956,Mineral resources development series,,,,https://cir.nii.ac.jp/crid/1130000795967248896