Education (1) Texts (1) Surveys (1) Texts (1) Piping (1) Wealth (1) Time (1) Religions (1) Languages, Modern (1) God (1) Extremities (Anatomy) (1) Equality (1) Comparative education (1) Civics--Study and teaching (1) Christians (1) Authors (1) Academic achievement (1) Research (1) Yields (1) Valuation (1) Languages (1) Women (1) Social life and customs (1) Science (1) Rating of (1) Evaluation (1) Tuberías--Diseño y construcción (1) Educación cívica (1) Rendimiento académico (1) Encuestas (1)