fa& 



USDA u. 



of Agriculture 



Agricultural 



Research 



Service 



Conservation 

 Research 

 Report No. 45 



December 2001 



i- 46RIC Lffl 



Eighty Years of 

 Vegetation and 

 Changes in the Northern 

 Great Plains 



A Photographic Record 



'' ' MM 



J*£ 



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