@phdthesis{oai:tsukuba.repo.nii.ac.jp:00035369,
 author = {山岡, 祐衣},
 month = {},
 note = {2014},
 school = {筑波大学, University of Tsukuba},
 title = {Preventing children from harmful experiences in early stage of life},
 year = {2015}
}