TY  - BOOK
AU  - Shiklomanov,I.A.
TI  - World water resources : : a new appraisal and assessment for the 21st century 
AV  - TD345 S55 1998
PY  - 1998///
CY  - Paris : 
PB  - UNESCO, 
KW  - Abastecimiento de agua
ER  -