活性汚泥の窒素の肥効に就て
On the Manurial Value of Nitorogen in the Activated Sludge

M. SIOIRI, T. KOBAYASI
1934 Japanese Journal of Soil Science and Plant Nutrition  
doi:10.20710/dojo.8.suppl_11 fatcat:4u6y6f2hwjc6pdzgjwx543nywm