@phdthesis{oai:tsukuba.repo.nii.ac.jp:00008289,
 author = {小玉, 芳敬 and Kodama, Yoshinori},
 month = {},
 note = {Two processes have been considered to explain downstream grainsize reduction in gravel-bed rivers. One is sorting which results in finer grains being transported downstream faster and further than the larger ones. ..., 1991},
 school = {筑波大学, University of Tsukuba},
 title = {Effect of abrasion on downstream gravel-size reduction in the Watarase river, Japan : field work and laboratory experiment},
 year = {1991}
}