papier (3) Weights and measures (3) Paper (3) tendance (2) enquête (2) étable (2) marché (2) éducation (2) attribut (2) profession (2) République populaire de Chine (2) Education (2) States (2) Origin (2) Birth (2) Women (2) Social sciences (2) Social mobility (2) Parturition (2) Occupational mobility (2) Migration, Internal (2) Labor (Obstetrics) (2) Industrialization (2) Estimates (2) Education (2) Childbirth (2) Addition (2) Educational mobility (2) Women (2) States (2)