TY  - BOOK
TI  - A biological assessment of the aquatic ecosystems of the río Paraguay Basin, Alto Paraguay, Paraguay / 
T2  - Bulletin of biological assessment ; 
SN  - 1881173402
U1  - 574.92989 
PY  - 2001///
CY  - Washington, DC : 
PB  - Conservation International, 
KW  - Ecologia de água doce
KW  - Paraguai
ER  -