TY  - JOUR 
T1  - Limnological study of Piraquara river (Upper Iguaçu basin): spatiotemporal variation of physical and chemical variables and watershed zoning
JO  - Brazilian Archives of Biology and Technology
A1  - Marques, Paulo Henrique C.
A1  - Oliveira, Haydée Torres de
A1  - Machado, Eunice da Costa
SN  - 1516-8913
UL  - 10.1590/S1516-89132003000300010
VL  - 46 
Y1  - 2003
PB  - Brasil 
ER  -