@Book{sitereport_115504,
 author = "佐久市教育委員会, ",
 title = "大井城跡",
 volume = "昭和62年度",
 publisher = "佐久市教育委員会",
 year = 1988,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/115504,
 }