A large part of the material for this publication was
obtained through interviews with Service officials. Much of it was also
contributed, on request, by the various Branches of the Service.
First Annual Report of the National Park Service,
Annual Report of the Director of the National Park
Service to the Secretary of the Interior for the Fiscal Year ended June
The Historical Background of the National Parks and
the National Park Service, by Isabelle F. Story, Park Service Bulletin,
Volume VI, Number 10, December 1936.
Service Monographs of the United States Government,
No. 11, "The National Park Service," The Brookings Institution.
Research and Education in the National Parks, by Dr.
Harold C. Bryant, National Park Service.
Reports of the Committees on Study of Educational
Problems in the National Parks: Preliminary Report, January 9, 1929;
Final Report, November 27, 1929.
Oh, Ranger! by Horace M. Albright and Frank J.
Parks, National and State, by John C. Merriam.
The Yellowstone National Park, by H. M.
One Hundred Years in Yosemite, by Dr. Carl P.
Russell, National Park Service.
The Department of the Interior, its History and
Proper Functions, by Louis C. Crampton, special attorney, Department of
Fauna Series No. 1, by George M. Wright, Joseph S.
Dixon, and Ben H. Thompson, National Park Service.