@Book{sitereport_96725,
 author = "ひたちなか市教育委員会文化課, ",
 title = "史跡虎塚古墳",
 volume = "",
 publisher = "茨城県ひたちなか市教育委員会",
 year = 1998,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/96725,
 }