Production (Economic theory) (2) Technique (2) Labor productivity (2) Effectiveness (2) Trabajo--Productividad (2) Productividad (2) Producción (2) Technique (2) Production (2) Productivité (2) Efficacité (2) Production (2) Technique (2) technologie (2) Burkina Faso (2) Instruction and study (1) Education (1) Deterioration (1) Technique (1) Spleen (1) Service industries (1) Science (1) Farms (1) Farm produce (1) Experience (1) Evidence (1) Dispensaries (1) Civilization, Modern (1) Classification (1) Classification (1)