@Book{sitereport_70081,
 author = "秋山, 隆雄",
 title = "国史跡琵琶塚古墳",
 volume = "1",
 publisher = "小山市教育委員会",
 year = 2015,
 series = "小山市文化財調査報告書",
 number = "94",
 url = https://sitereports.nabunken.go.jp/70081,
 }