Biological methods for the assessment of water quality; :   a symposium presented at the seventy-fifth annual meeting, American Society for Testing and Materials / 
John Cairns & K. L. Dickson. 
 - Philadelphia :  American Society For Testing And Meterials,  1973. 
 - 254 p. :  ill. ;  20 cm. 
<br/><br/>includes index. 
<br/><br/><label>ISBN: </label>(hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality biological assessment.
<br/><br/><label>Dewey Class. No.: </label>628.161  / CAI