Edwards, R. W. <br/><br/>
Conservation and productivity of natural waters 

 - London  Academic Press  1972 
 - xv, 318p.  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aquatic resources
<br/><br/><label>LC Class. No.: </label>QL1.Z733 No. 29