MITCHELL MARK K. <br/><br/>
FIELD MANUAL FOR WATER QUALITY MONITORING:  AN ENVIRONMENTAL EDUCATION PROGRAM FOR SCHOOLS. 

 - 11 th ED 
 - WESTMARK;  KENDALL/HUNT PUBLISHING COMPANY,  1997. 
<br/><br/><label>ISBN: </label>0787237302 
<br/><br/><label>Dewey Class. No.: </label>333.717 MIT