TY  - BOOK
AU  - G.S Ward
AU  - P.R Parrish
TI  - Manual of Methods in aquatic Environment research part 6-Toxicity Tests 
T2  - FAO Fisheries Technical Paper No.185
SN  - 9251011788
U1  - 639.2 
PY  - 1982///
CY  - Rome
PB  - FAO of the United Nations
ER  -