Ohki, Takaaki.
Physicochemical properties of sludge and it's effectiveness as a soil-additive / Takaaki Ohki ...[et al.]. - Japan: Research Institute of Industrial Technology, Nihon University, 1992. - 15 p. : ill. - Report of the Research Institute of Industrial Technology, Nihon University; .
03861678
Sewage sludge as fertilizer.
Physicochemical properties of sludge and it's effectiveness as a soil-additive / Takaaki Ohki ...[et al.]. - Japan: Research Institute of Industrial Technology, Nihon University, 1992. - 15 p. : ill. - Report of the Research Institute of Industrial Technology, Nihon University; .
03861678
Sewage sludge as fertilizer.