@Book{sitereport_30926,
 author = "岡田, 光広",
 title = "関宿城跡",
 volume = "",
 publisher = "千葉県教育委員会 and 財団法人千葉県文化財センター",
 year = 1989,
 series = "千葉県文化財センター調査報告",
 number = "155",
 url = https://sitereports.nabunken.go.jp/30926,
 }