World water resources : a new appraisal and assessment for the 21st century
Shiklomanov, I. A.
World water resources : a new appraisal and assessment for the 21st century - Paris : UNESCO, 1998 - 37 páginas : fotografías a color
Abastecimiento de agua
World water resources : a new appraisal and assessment for the 21st century - Paris : UNESCO, 1998 - 37 páginas : fotografías a color
Abastecimiento de agua