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
"Fröhlich, A. (Albrecht)","Central extensions, Galois groups, and ideal class groups of number fields",,American Mathematical Society,1983,Contemporary mathematics,,0821850229,,https://cir.nii.ac.jp/crid/1130000795427064448