"Sewerage." . . . . . . . . "The cleaning and sewerage of cities" . "The cleaning and sewerage of cities"@en . . . . . . . "Cleaning and sewerage of cities"@en . . "Cleaning and sewerage of cities" . . "The cleaning and sewerage of cities sewerage--sewage disposal--street cleaning"@en . . . . . . . "The cleaning & sewerage of cities"@en . . . . . "The cleaning and sewerage of cities; sewerage--sewage disposal--street cleaning"@en . . . . "Limpieza de las calles." . . "Street cleaning." . . "Alcantarillado." . . . .