@Book{sitereport_28998,
 author = "大塚, 初重",
 title = "綿貫観音山古墳",
 volume = "2 : 石室・遺物編",
 publisher = "財団法人群馬県埋蔵文化財調査事業団",
 year = 1999,
 series = "群馬県埋蔵文化財調査事業団調査報告",
 number = "255",
 url = https://sitereports.nabunken.go.jp/28998,
 }