@phdthesis{oai:tsukuba.repo.nii.ac.jp:00020818,
 author = {武田, 一郎 and Takeda, Ichirou},
 month = {},
 note = {1982},
 school = {筑波大学, University of Tsukuba},
 title = {Beach changes by waves},
 year = {1983}
}