活性汚泥の窒素の肥効に就て
ON THE AVAILABILITY OF NITROGEN IN ACTIVATED SLUDGE

Matsusaburo SHIOIRI, Takashi KOBAYASHI
1935 Japanese Journal of Soil Science and Plant Nutrition  
doi:10.20710/dojo.9.2_159 fatcat:65vg4xj73vhcvmxfaxpqsfoamm