vent (3) végétation (3) étable (3) sable (3) pression (3) paysage (3) pays (3) évolution (3) érosion (3) Brésil (3) Dynamics (3) Area (3) Area (3) Winds (3) Water-supply (3) Sand (3) Rio Grande (Colo.-Mexico and Tex.) (3) Quartz (3) Pressure (3) Plants (3) Mountains (3) Landscapes (3) Land use (3) Grain (3) Evolution (3) Erosion (3) Dynamics (3) Dowry (3) Conversion (3) Comprehension (3)