@Book{sitereport_130421,
 author = "余市町教育委員会, ",
 title = "1990年度大川遺跡発掘調査概報",
 volume = "",
 publisher = "余市町教育委員会",
 year = 1991,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/130421,
 }