[Sanitation in arid zones].
D000383:Agriculture; D007220:Industrial Waste; D007878:Legislation as Topic; D012423:Rural Health; D012499:Sanitation; D012722:Sewage; D013030:Spain; D014876:Water Pollution; D014881:Water Supply
D007220:Industrial Waste; D012722:Sewage
El saneamiento en las zonas áridas.