TY  - BOOK
AU  - HELLAWELL, J.M.
TI  - BIOLOGICAL INDICATORS OF FRESHWATER POLLUTION AND ENVIRONMENTAL MANAGEMENT
SN  - 1851660011
U1  - 628.161 
PY  - 1986///
CY  - Estados Unidos
PB  - ELSEVIER APPLIED SCIENCE
KW  - CONTAMINACION
ER  -