@Book{sitereport_132905,
 author = "函館市教育委員会, ",
 title = "特別史跡五稜郭跡外堀取水管布設工事概要報告",
 volume = "",
 publisher = "函館市教育委員会",
 year = 1974,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/132905,
 }