Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Harada Eiichi,Uber die Kirchenreform im 11 Jahrhundert,Bulletin of the Yamagata University. Cultural science,05134641,Yamagata University,1960-02-17,4,3,23-52,https://cir.nii.ac.jp/crid/1570291226831215616,