Costa Rica (3) Methodology (2) Mechanical movements (2) Children (2) Mecanismos (2) Estudio (2) Niños (2) Metodología (2) Programs (1) Genes (1) Minors (1) Zinc (1) Weights and measures (1) Water (1) Technology (1) Sex (Biology) (1) Sewage--Purification (1) Sewage (1) Probabilities (1) Plants (1) Pipe (1) Parents (1) Parasitic diseases (1) Parasites (1) Nutrition (1) Months (1) Meat (1) Mayo dialect (Piman) (1) Machine-shop practice (1) Logistics (1)