Abstract
References
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Washington DC.
Environmental Protection Agency , Office of Toxic Substances (TS-792) August 1982 ; EPA 560/6-82-001.
2.
Good Laboratory Practice Standards for Health Effects; Environmental Protection Agency . Federal Register
44 (No. 91 ):27362 , May 9, 1979 .
3.
Finney DJ.
Probit Analysis.
3rd Ed.
Cambridge , University Press , 1971 , pp 20 –80 .