Fern Valley trail, the National Arboretum. 

 - [Washington,  U.S. Govt. Print. Off.,  1968] 
 - 8 p.  illus.  24 cm. 
 - United States. Dept. of Agriculture. PA-  879 .
 - United States.  Department of Agriculture.  PA-  879. .
 - Program aid (United States. Department of Agriculture) ;  no. 879. .
<br/><br/><label>LCCN: </label>agr68000252  
<br/><br/><label>Subjects--Corporate Names: </label><br/>National Arboretum (U.S.)<br/>United States. National Arboretum. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ferns--United States.<br/>Ferns--United States.
<br/><br/><label>LC Class. No.: </label>S21  / .A856 no. 879 
<br/><br/><label>National Agricultural Library Call No.: </label>1 Ag84Pro no. 879