Wells (2) Geography (2) Estudio (2) Información (2) Pozos (2) Geografía (2) Programs (1) Environmental degradation (1) Labor (1) Geographic information systems (1) Trials (1) Technology (1) Stability (1) Population (1) Materials (1) Id (Psychology) (1) Electronic spreadsheets (1) Education (1) Diagnosis (1) Communities (1) Climatology (1) Chemical elements (1) Sistemas de información geográfica (1) Medio ambiente--Degradación (1) Programas (1) Estabilidad (1) Terrenos (1) Espacio (1) Hojas electrónicas (1) Educación (1)