@Book{sitereport_58601,
 author = "茂, 和敏",
 title = "観音山古墳群",
 volume = "7",
 publisher = "那珂川町教育委員会",
 year = 2009,
 series = "那珂川町文化財調査報告書",
 number = "74",
 url = https://sitereports.nabunken.go.jp/58601,
 }