Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ikuta Ryuji,The American Steel Industry and Small Business during the Great Depression in the 1930s : From a viewpoint of the transition in the demand structure,The Journal of Agrarian History,04933567,The Agrarian History Society (Renamed as The Political Economy and Economic History Society),1999,42,1,1-16,https://cir.nii.ac.jp/crid/1390001206092974592,https://doi.org/10.20633/tochiseido.42.1_1