Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 河野 泰之,天水田における土地改良事業の経済効果,"Journal of the Agricultural Engineering Society, Japan",03695123,"The Japanese Society of Irrigation, Drainage and Rural Engineering",1987,55,9,893-896,https://cir.nii.ac.jp/crid/1390001205921454592,https://doi.org/10.11408/jjsidre1965.55.9_893