@article{oai:air.repo.nii.ac.jp:00005755,
 author = {渡辺, 英夫 and WATANABE, Hideo},
 journal = {秋大史学},
 month = {Jun},
 pages = {22--50},
 title = {佐竹氏入部前後の由利領北部地域},
 volume = {67},
 year = {2021}
}