National sign system study
Publisher: National Park Service
Published: 1987
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 44
Subjects: Signs and signboards -- United States; National parks and reserves -- United States -- Management
Notes: Cover title

Shipping list no.: 87-687-P

"September 1987"--P. [3] of cover

"NPS D-302"--P. [3] of cover

Bibliography: p. 43-44