Programs (1) Weights and measures (1) Water quality (1) Sanitation (1) Sampling (1) Refuse and refuse disposal (1) Refrigerators (1) Reason (1) Public health (1) Production (Economic theory) (1) Population (1) Pollution (1) Methodology (1) Industries (1) Identification (1) Fountains (1) Diagnosis (1) Birds (1) Animals (1) Agua--Calidad (1) Programas (1) Olores (1) Toma de muestras (1) Residuos (1) Identificación (1) Razón (1) Fuentes (1) Estudio (1) Fauna (1) Pesos y medidas (1)