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 "Kowalski, Ronald I.",The Bolshevik Party in conflict : the left communist opposition of 1918,,University of Pittsburgh Press,1991,Series in Russian and East European studies,,0822911612,,https://cir.nii.ac.jp/crid/1130000795092885120