"Eaux usées Évacuation dans le sol." . . "Soil mechanics." . . "Land treatment of wastewater." . . "Runoff." . . "Sanitary landfills." . . "Boden." . . "Eaux usées Épuration par le sol." . . "Factory and trade waste Purification." . . "Abwasserreinigung." . . "Factory and trade waste Management." . . "Industrieabfall." . . "Déchets industriels Épuration." . . "Sewage disposal in the ground." . . "Sewage Purification." . . . . . . . . "Land treatment systems for municipal and industrial wastes" . "Land treatment systems for municipal and industrial wastes"@en . . . . . . . . . . . "Electronic books"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Land Treatment Systems for Municipal and Industrial Wastes"@en . . "Biotechnology." . . "Soil absorption and adsorption." . . . . "Environmental hydraulics." . . "Sewage irrigation." . .