Social sciences (1) Self-perception (1) Refuse and refuse disposal (1) Measurement (1) Life (1) Equations (1) Aging (1) Adulthood (1) Residuos (1) Autoconcepto (1) Edad adulta (1) Vida (1) Envejecimiento (1) Ecuaciones (1) Ciencias sociales (1) Medición (1)