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
"Ulmer, Melville Jack","Trends and cycles in capital formation by United States railroads, 1870-1950",,University Microfilms,1954,Occasional paper,,,,https://cir.nii.ac.jp/crid/1130000797126659200