Research accomplishments. 1970 

 - Washington :  Governmnet Printing Office,  1970 
 - 174 p. 
<br/><br/><label>LCCN: </label>40073 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bosques--Investigación.
<br/><br/><label>Dewey Class. No.: </label>634.907  / E8 1970