Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KITAMURA Hideki and ISHITANI Hisashi and KUGE Yoshio and NAKAMOTO Masao,Determination of Nitrate in Freshwater and Sea water by a idrazine Reduction Method,Japan journal of water pollution research,0387-2025,Japan Society on Water Environment,1982,5,1,35-42,https://cir.nii.ac.jp/crid/1390282680059205504,https://doi.org/10.2965/jswe1978.5.35