@Book{sitereport_981,
 author = "冨沢, 一明",
 title = "今井城跡",
 volume = "",
 publisher = "佐久市教育委員会文化財課",
 year = 2010,
 series = "佐久市埋蔵文化財調査報告書",
 number = "178",
 url = https://sitereports.nabunken.go.jp/981,
 }