@Book{sitereport_51835,
 author = "",
 title = "笠間城跡保存整備基礎調査報告書",
 volume = "",
 publisher = "笠間市教育委員会",
 year = 2014,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/51835,
 }