Estudios (3) Social sciences (2) Research (2) Periodicals (2) Nature (2) Id (Psychology) (2) Estudio (2) Ciencias sociales (2) Publicaciones periódicas (2) Naturaleza (2) Investigación (2) Cultura (2) Ello (2) culture (2) Environmental sciences (1) Labor (1) Futures (1) Women scientists (1) Weights and measures (1) Vision (1) Trials (1) Trails (1) Tourism (1) Social structure (1) Scientists (1) Reality (1) Raw materials (1) Profit (1) Production (Economic theory) (1) Portuguese language (1)