Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAKURA Yoshio,Regulation and present situation on Johkasou (On-site waste water treatment system),Journal of Environmental Conservation Engineering,03889459,Society of Environmental Conservation Engineering,2004,33,9,652-656,https://cir.nii.ac.jp/crid/1390282679568722560,https://doi.org/10.5956/jriet.33.652