Students (2) Research (2) Estudios (2) Estudiantes (2) Existencia (2) Investigación (2) autorisation (1) analyse (1) Colombie (1) Labor (1) States (1) School enrollment (1) Certification (1) Youth (1) Time (1) Thought and thinking (1) Symptoms (1) School environment (1) Production (Economic theory) (1) Process (Law) (1) Persons (1) Personality (1) Perception (1) Measurement (1) Logistics (1) Life cycle, Human (1) Families (1) Factor analysis (1) Example (1) Evaluation (1)