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
"National Bureau of Economic Research and Hultgren, Thor",Railway traffic expansion and use of resources in World War II,,National Bureau of Economic Research,1944,Occasional paper,,,,https://cir.nii.ac.jp/crid/1130000796880650368