USES OF NATURAL AREAS 



41 



Ortmann, Arnold E. 



1909. The Destruction of the Fresh- 

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Shelford, Victor E. 



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 the Dangers of Pollution to 

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Ward, Henry B. 



1918. The Elimination of Stream Pol- 



lution in New York State. 

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1919. Stream Pollution in New York 



State. A Preliminary In- 



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Whipple, George C. 



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Wilson, Charles B., and Clark II. Walton, 

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 1912. The Mussel Fauna of the Kan- 

 kakee River. Bureau of Fish- 

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