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2. Métodos normalizados para el análisis de aguas potables y residuales;APHA,1992
3. Production and characterisation of sintered ceramics from paper mill sludge and glass cullet;Asquini;Chemosphere,2008
4. Brick: an Innovative Sludge Solidification Process;Berman,1982
5. Structural Clay Product;Brownell,1976