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- [5] SEWAGE-SLUDGE AS A FOREST FERTILIZER - EXPERIENCES TO DATE WATER POLLUTION CONTROL, 1987, 86 (01): : 158 - 171
- [6] SEWAGE-SLUDGE HYGIENIZATION PLANT SUPPLIES FERTILIZER WATER SERVICES, 1980, 84 (1018): : 711 - 713
- [7] EFFECTS OF COMPOSTED SEWAGE-SLUDGE ON THE RESIDUAL ION CONTENT OF SOILS AGROCHIMICA, 1995, 39 (01): : 53 - 60
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