puits (1) temps (durée) (1) groupe social (1) réflexion (1) lumière (1) plomb (1) histoire (1) analyse (1) débit (1) Construction (1) History (1) Control (1) Work (1) Value (1) Time (1) Students (1) Speeches, addresses, etc (1) Space and time (1) Societies (1) Social groups (1) School children (1) Revivals (1) Reproduction (1) Questioning (1) Projection (1) Portages (1) Persons (1) Perception (1) Must (1) Measurement (1)