Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
AOKI S.,Appearances and Characteristics of Scribbles and Graffiti in the Tunnels in Ibaraki Prefecture,Geographical Space,18829872,Japan Association on Geographical Space,2009,2,2,175-188,https://cir.nii.ac.jp/crid/1390001206132265216,https://doi.org/10.24586/jags.2.2_175