Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"United States. Census Office and Pumpelly, Raphael","Report on the mining industries of the United States (exclusive of the precious metals), with special investigations into the iron resources of the republic and into the cretaceous coals of the Northwest",,Norman Ross,1991,Census of the United States,,0883544385,,https://cir.nii.ac.jp/crid/1130000794824344448