McDonald, Philip M. <br/><br/>
Ponderosa pine seedlings and competing vegetation  : ecology, growth, and cost 

 - Berkeley, Ca :  Forest Service. Pacific Southwest Research Station,  1990 
 - 10 p.  : ilus 
 - Research paper  ; PSW-199 .
 - Research paper  ; PSW-199 .
<br/><br/><label>LCCN: </label>2474 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología forestal.<br/>Pináceas--Crecimiento.<br/>Pináceas--Semilla.<br/>Pinus ponderosa.