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
"Kaufmann, J. E. and Kaufmann, H. W.","The central states : Germany, Austria-Hungary and Czechoslovakia",,Pen & Sword Military,2014,The forts and fortifications of Europe 1815-1945,,9781848848061,,https://cir.nii.ac.jp/crid/1130848327661624448