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Assunto |
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Wages [3] |
Waldron, Jeremy [1] |
Wallace, Alfred Russel, 1823-1913 [1] |
Walsh, Rodolfo (1927-1977) [1] |
Walsh, Rodolfo, 1927-1977 [3] |
Walzer, Michael [1] |
War [9] |
War of independence [4] |
Waste management [6] |
Waste recycling [8] |
Waste treatment [6] |
Waste waters [1] |
Wastes [2] |
Water [3] |
Water pollution [9] |
Water requeriments [3] |
Water resources [3] |
Water supply [4] |
Water supply services [2] |
Water treatment plants [1] |