@Book{sitereport_132235,
 author = "日田市教育委員会, ",
 title = "天然記念物小野川の阿蘇4火砕流堆積物及び埋没樹木群",
 volume = "",
 publisher = "日田市教育委員会",
 year = 2012,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/132235,
 }