Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) WADA Kazunori and ARITA Shigeru and GOTO Satoko,A study on the Origin of Seigyu (Crib Spur) in Japan,Journal of Historical Studies in Civil Engineering,1349-5712,Japan Society of Civil Engineers,2005,24,0,151-160,https://cir.nii.ac.jp/crid/1390282680210242560,https://doi.org/10.11532/journalhs2004.24.151