National natural landmarks
Subtitle: 25th anniversary, 1962-1987
Contributors: United States. National Park Service
Publisher: U.S. Dept. of the Interior, National Park Service
Published: 1987
Place of publication: [Washington, D.C.?]
Language: eng
Subjects: National monuments -- United States; National parks and reserves -- United States
Notes: Shipping list no.: 87-703-P