@Book{sitereport_10521, author = "玉井, 輝男 and 滝坂, 滋", title = " 国指定史跡関城跡", volume = "", publisher = "関城町教育委員会", year = 2001, series = "茨城県真壁郡関城町埋蔵文化財調査報告", number = "", url = https://sitereports.nabunken.go.jp/10521, }