Ponencias 

 - Washington :  Forest Service,  1983 
 - 120 p.  : ilus. 
 - General Technical Report WO - 365 .
 - General Technical Report WO - 365 .
<br/><br/><label>LCCN: </label>67603 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medio ambiente.<br/>Vida silvestre--E.U.A.<br/>Vida silvestre--México.
<br/><br/><label>Dewey Class. No.: </label>719.36  / R48 1981