Exploring our national parks and monuments ...
Contributors: National Parks Association (U.S.)
Edition: 4th ed.
Publisher: Houghton Mifflin
Published: 1954
Place of publication: Boston
Language: eng; ger
Number of pages: 288
Subjects: National parks and reserves -- United States.
Notes: Bibliography: p. 279-284.
"Prepared under the auspices of the National parks association."