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5. 6) 福岡地下鉄七隈線延伸工事現場における道路陥没に関する検討委員会，国立研究開発法人土木研究所：福岡地下鉄七隈線延伸工事現場における道路陥没に関する検討委員会報告書，国立研究開発法人土木研究所 HP（https://www.pwri.go.jp//jpn/kentou-iinkai/kentou-iinkai.html），2017. [Fukuoka tikatetsu nanakuma sen ensin kouzi gennba ni okeru douro kanbotsu ni kannsuru kentou iinkai and Public Works Research Institute: Fukuoka tikatetsu nanakumasen ensin kouzi gennba ni okeru douro kanbotsu ni kannsuru kentou iinkai houkokusyo, Public Works Research Institute HP (https://www.pwri.go.jp//jpn/kentou-iinkai/kentou-iinkai.html), 2017.]