@phdthesis{oai:tsukuba.repo.nii.ac.jp:00020959,
 author = {河上, 強志},
 month = {},
 note = {2005, Includes bibliographical references},
 school = {筑波大学, University of Tsukuba},
 title = {Behavior of several herbicides applied to paddy fields in water-sediment system},
 year = {2006}
}