Doors (1) Development (1) Family relationships (1) Children (1) Needs assessment (1) Value (1) Time (1) Spitz dogs (1) Signals and signaling (1) Necessity (Philosophy) (1) Indigenous peoples (1) Ladders (1) Helplessness (Psychology) (1) Cycles (1) Building (1) Biological rhythms (1) Attachment behavior (1) Measurement (1) Attitudes (1) Separation (1) Evolution (1) Recreation (1) Organization (1) Family (1) Apego (Psicología) (1) Análisis de necesidades (1) Necesidad (Filosofía) (1) Indefensión aprendida (1) Valor (Economía) (1) Organizaciones (1)