The potential effects of clearing and snagging on stream ecosystems / 
by G. Richard Marzolf 
 - Missouri :  U.S. Govt. Print. Off.,  1978 
 - vii, 31 p. :  ill. ;  27 cm. 
 - Biological Services Program FWS/OBS;  78/14 .
<br/><br/> January 1978 
<br/><br/>Bibliography : p. 24-31 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Stream ecology--United States<br/>Stream channelization--Environmental aspects<br/>Water resources development--Environmental aspects
<br/><br/><label>Dewey Class. No.: </label>577.640973