Social sciences (3) Ciencias sociales (3) Health (2) Salud (2) Estudio (2) Violence in the workplace (1) Employees (1) Social networks (1) Water (1) Valuation (1) Type A behavior (1) Treaties (1) Teaching (1) Teachers (1) Students (1) Sexual harassment (1) Research (1) Refuse and refuse disposal (1) Proportion (1) Pollution (1) Personality (1) Noise (1) Natural resources (1) Mexicans (1) Matter (1) Human beings (1) Legislation (1) Laboratories (1) Interviews (1) Industrial safety (1)