Exploring our national parks and monuments.
By: Drawings and uncredited photos. by the author.
Edition: 6th ed. rev.
Publisher: Houghton Mifflin
Published: 1969
Place of publication: Boston
Language: eng
Number of pages: 369
Subjects: National parks and reserves -- United States -- Guidebooks.; National monuments -- United States -- Guidebooks.
Notes: Bibliography: p. 360-366.