Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
United States. Committee on Investigation of Gold-mining Situation in the United States,Report of a joint committee appointed from the Bureau of Mines and the United States Geological Survey by the Secretary of the Interior to study the gold situation,,U.S. G.P.O.,1919,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000796789007872