USES OF NATURAL AREAS 



51 



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 1921. Grazing Practice on the Na- 

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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 



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in the National Forests. 

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1919. Natural Historj^ of Paradise Key 



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1920. Pre.serves of Natural Conditions. 



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 1920. Guide to the Summer Birds of 

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Skinner, M. P. 



1925. The Birds of Yellowstone Na- 

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Smith, Harlan I. 

 1914. Handbook of the Rocky Moun- 

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1920. The Need for a More Serious 



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