@Book{sitereport_82909,
 author = "那珂川町教育委員会, ",
 title = "観音山古墳群",
 volume = "4",
 publisher = "那珂川町教育委員会",
 year = 1992,
 series = "那珂川町文化財調査報告書",
 number = "30",
 url = https://sitereports.nabunken.go.jp/82909,
 }