USES OF NATURAL AREAS 



51 



Korstian, Clarence F. 

 1921. Grazing Practice on the Na- 

 tional Forests and its Effect 

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 Monthly, Vol. 13, pp. 275-281. 



Leopold, Aldo 



1921. The Wilderness and its Place in 



Forest Recreational Policy. 



Jour. Forestry, Vol. 19, pp. 



718-721. 

 Mills, Enos A. 

 1920. The Adventures of a Nature 



Guide. Pp. 1-271. New York. 

 Pearson, G. A. 



1922. Preservation of Natural Areas 



in the National Forests. 

 Ecology, Vol. 3, pp. 284-287. 

 Safford, W. E. 



1919. Natural History of Paradise Key 



and the Near-by Everglades 

 of Florida. Smithsonian 

 Report for 1917, pp. 377-434. 

 Shelford, Victor E. 



1920. Preserves of Natural Conditions. 



Trans. III. State Acad Sci.. 

 Vol. 13, pp. 37-58. 

 Silloway, P. M. 



1920. Guide to the Summer Birds of 

 the Bear Mountain and Harri- 

 man Park Sections of the Pali- 

 sades Interstate Park. N. 

 Y. State College of Forestry, 

 Syracuse, Bull. No. 11, pp. 

 1-105. 



1920a. The Palisades Interstate Park: 

 A Study in Recreational For- 

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Skinner, M. P. 



1925. The Birds of Yellowstone Na- 

 tional Park. Roosevelt Wild 

 Life Bull, Vol. 3, pp. 1-189. 



Smith, Harlan I. 



1914. Handbook of the Rocky Moun- 

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 Interior, Canada, Dominion 

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Sumner, Francis B. 



1920. The Need for a More Serious 



Effort to Rescue a Few Frag- 

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 Sci. Monthly, Vol. 10, pp. 236- 



1921. The Responsibility of the Biol- 



ogist in the Matter of Pre- 

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 Science, N. S., Vol. 54, pp. 

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Waugh, Frank A. 



1918. A National Park Policy. Sci. 

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1922. What is a Forest? Jour. For- 



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