@techreport{oai:waseda.repo.nii.ac.jp:00027201,
 author = {宮島, 英昭 and 川本, 真哉 and Miyajima, Hideaki and Kawamoto, Shinya},
 issue = {006},
 month = {Mar},
 title = {THE COMPETITIVE CAPABILITIES AND COST OF PREWAR BUSINESS GROUPS},
 year = {2010}
}