Trees:  The yearbook of agriculture, 1949 

 - Washington, D.C.:   The United States Department of Agriculture,   1949 
 - xiv, 944p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture 
<br/><br/><label>Universal Decimal Class. No.: </label>R 63(058)  / H9