Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) BABA Shunsuke and HIGUCHI Teruhisa and LIU Yu,Survey of Civil Engineering Heritage in Japan Constructed before and including Edo Era A proposal concerning how to classify the degree of preservation of the older traditional structures before the Restoration,Journal of Historical Studies in Civil Engineering,13495712,Japan Society of Civil Engineers,2008,27,0,61-76,https://cir.nii.ac.jp/crid/1390001205233949696,https://doi.org/10.11532/journalhs2004.27.61