Porcella, Donald B. <br/><br/>
Characteristics of nonpoint source urban runoff and its effects on stream ecosystems / 
by Donald B. Porcella 
 - Washington :  United States Government Printing Office,  1980 
 - Various pagings :  ill. ;  28 cm. 
 - EPA-600/3-80-032 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Stream ecosystems<br/>Urban runoff
<br/><br/><label>Dewey Class. No.: </label>363.7284