I50 THE NATIONAL PARK SERVICE 



conference . . . Washington, Govt, print, off., 1913. I44 



P- 



[Consists mainly of a discussion regarding the advisability of ad- 

 mitting automobiles to the national parks] 



National park conference, 3d, Berkeley, Cal., Mar. 11-13, 1915. 

 Proceedings of the third National park conference. . . . 

 Washington, Govt, print, off., 1915. 166 p. 



Discussion of national park problems by officers of the gov- 

 ernment and others. 



National park conference, 4th, Washington, D. C, Jan. 2-6, 

 1917. Proceedings of the fourth National park confer- 

 ence. . . . Washington, Govt, print, off., 1917. . 100 ( ?) 



P- 

 National park pictures collected and exhibited by 



the Department of the interior. [Washington, Govt, print. 



off., 191 1] 15 p. 



"This collection of pictures has been assembled for free 



exhibition at public libraries and other institutions." cf. 



p. I. 



National park service in the District of Columbia 



. . . communication from the Secretary of the interior sub- 

 mitting an estimate of appropriations for the administration 

 in the District of Columbia of the National park service 

 created by the act of Congress, approved Aug. 25, 1916. 

 Washington, Govt, print, off., 1916. 2 p. (64th Cong., 

 1st sess. House. Doc. no. 1349) Serial 7102 



National parks portfolio. Department of the in- 

 terior. [New York, C. Scribner's sons, 1916] 9 p. 

 nine illustrated pamphlets with 4 pages of introductory text, 

 in portfolio, describing the various national parks. 



Procedure in matters relating to the national parks 



and the Hot Springs reservation. [Washington, Govt, 

 print, off., 191 1 ] 3 p. 



Progress in the development of the national parks, 



by Stephen T. Mather, assistant to the Secretary of the in- 



