Forest soils of the douglas-fir region /  
compiled and edited by Paul Heilman, Harry W. Anderson, David M. Baumgartner. 
 - Washington :   Washington State University,   1979. 
 - vi, 298 p.  foto., graf. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SUELO FORESTAL
<br/><br/><label>Dewey Class. No.: </label>531