Fern Valley trail
Subtitle: the National Arboretum
Series: Program aid -- 879; Program aid (United States. Department of Agriculture) -- no. 879.
Publisher: National Arboretum
Published: 1974
Place of publication: Washington, D.C
Language: eng
Subjects: National Arboretum (U.S.); National parks and reserves; Ferns
Notes: "Revised 1974"--Page 8.