A symposium on biological methods for the assessment of water quality presented at the seventy-fifth annual meeting, American Society for Testing and Materials. / 
John Cairns, Jr., and K. L. Dickson, editors. 
 - Philadelphia :  American Society for Testing and Materials,  c1973. 
 - vii, 256 p. :  ill. ;  24 cm. 
 - ASTM special technical publication 528. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality bioassay--Congresses.