Pérou (1) Employees (1) Wealth (1) Water quality (1) Water (1) Temperature (1) Quality of products (1) Pollutants (1) Plants (1) Phytoplankton (1) Mines and mineral resources (1) Miners (1) Metals (1) Lakes (1) Indexes (1) Heavy metals (1) Foundries (1) Evaluation (1) Charophyta (1) Algae (1) Agua--Calidad (1) Estudios (1) Contaminantes (1) Carófitas (1) Evaluación (1) Fundiciones (1) Metales pesados (1) RED (1) Estudio (1) Calidad (1)