The National Arboretum for research and education. 

 - [Washington,  1964] 
 - [12] p. (incl. cover)  illus.  20 x 27 cm. 
<br/><br/> Cover-title. 
<br/><br/><label>LCCN: </label>agr64000272  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>National Arboretum (U.S.)
<br/><br/><label>LC Class. No.: </label>QK479  / .U5 
<br/><br/><label>Gov. Doc. Class. No.: </label>A 77.502:Ar 1/2