national park system plan.
Published: 1972
Place of publication: [Washington]
Language: eng
Subjects: United States. -- National Park Service; National parks and reserves -- United States; Natural history -- United States
Other titles: Part one of the national park system plan history; Part two of the national park system plan natural history
Notes: Bibliography: pt. 2, p. 137-140.
Table of contents: title: pt. 1. History.; title: pt. 2. Natural history.