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 "Young, Clinton Mason and Illinois. State geological survey and United States. Bureau of mines and Illinois. University",Percentage of extraction of bituminous coal with special reference to Illinois conditions,,University of Illinois,1917,University of Illinois bulletin,,,,https://cir.nii.ac.jp/crid/1130282272188183808