Brazil's Caesb calls water, sewer systems maintenance tender: http://www.bnamericas.com/news/waterandwaste/brazils-caesb-calls-water-sewer-syste...
Published by Leonardo Zanata, Professor at Faculdades Oswaldo Cruz
Brazil's Caesb calls water, sewer systems maintenance tender: http://www.bnamericas.com/news/waterandwaste/brazils-caesb-calls-water-sewer-systems-maintenance-tender