@Book{sitereport_11478, author = "齋藤, 武士", title = "茨城県筑西市海老ヶ島城跡", volume = "", publisher = "筑西市教育委員会 and 地域文化財コンサルタント", year = 2006, series = "筑西市埋蔵文化財調査報告書", number = "3", url = https://sitereports.nabunken.go.jp/11478, }