Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kumazawa Kikuo and Yamamoto Youji and Park Kwang-Lai and Tamura Yukimi,NO_3-N and δ^<15>N Values of Water in the Tamagawa River,Japanese Journal of Soil Science and Plant Nutrition,0029-0610,Japanese Society of Soil Science and Plant Nutrition,2000,71,2,216-224,https://cir.nii.ac.jp/crid/1390001206558039552,https://doi.org/10.20710/dojo.71.2_216