Methods for aquatic toxicity identification evaluations.    Phase I    Toxicity characterization procedures /  
edited by T.J. Norberg-Ki ng ...[et al]. 
 - 2nd ed. 
 - Washington, D.C. :    United States Environmental Protection Agency,    1991. 
 - v :    ill. ;    28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Toxicity testing.<br/> Water-pollution -- Toxicology.
<br/><br/><label>Dewey Class. No.: </label>615.907