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       REFINE  
              Browse All : Geology Book and Atlas Map and National Parks by Thompson, A.H.
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    Author 
        [USGS (U.S. Geological Survey), Walcott, Charles D., Gannett, Henry, Leiberg, John B., Thompson, A.H.] 
      Full Title 
        Plate LXXI. Ashland Quadrangle. Oregon. Land Classification and Density of Standing Timber. Julius Bien & Co. Lith. N.Y. 
      Publisher 
        Government Printing Office 
      Author 
        [USGS (U.S. Geological Survey), Walcott, Charles D., Sudworth, George B.] 
      Full Title 
        Plate CXV. Sonora Quadrangle, California. Land Classification and Density of Standing Timber. 
      Publisher 
        Government Printing Office 
      
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