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 "Gulley, Harold Everett",Railways and the seaborne grain export trade in Tsarist Russia : 1861-1914,,Supplied by the British Library Document Supply Centre,1988,British thesis,,,,https://cir.nii.ac.jp/crid/1130000795800833408