Trabajo (3) Employment (2) Human engineering (2) Chemicals (2) Occupations (2) Travail (2) Travail (2) travail (2) Assaying (1) Prevention (1) Methodology (1) Case studies (1) Exhibitions (1) Video recording (1) Labor (1) Computer-aided software engineering (1) Employees (1) Male actors (1) Weights and measures (1) Vocation (1) Time (1) Termites (1) Struggle (1) Real-time data processing (1) Physical anthropology (1) Perspective (1) Perception (1) Working class (1) Industrial hygiene (1) Industrial arts (1)