@Book{sitereport_58566,
 author = "佐藤, 昭則",
 title = "観音山古墳群",
 volume = "2",
 publisher = "那珂川町教育委員会",
 year = 1986,
 series = "那珂川町文化財調査報告書",
 number = "14",
 url = https://sitereports.nabunken.go.jp/58566,
 }