. . "Manuels." . . "Pollution." . . "Eau Épuration." . . "Water Pollution prevention & control." . . . . . . . . "Handbooks and manuals" . "Handbooks and manuals"@en . . . . . . . . . . . . . . "Pollutant removal handbook"@pt . . . . "Pollutant removal handbook" . "Pollutant removal handbook"@en . . . . . . . . "Déchets industriels." . . "Air Épuration." . . "Pollution de l'air." . . "Milieubescherming. Milieutechnologie." . . "Pollution de l'eau." . . "Schadstoffverringerung." . . "Industrial Waste analysis." . . "Lutte antipollution." . . "Air Pollution prevention & control." . .