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    • Silvical characteristics of red spruce (Picea rubens) 

      Hart, Alan C. (USDA Forest Service. Northeastern Forest Experiment Station, 1959)
      Red spruce (Picea rubens Sarg.) is not only the most important of the spruces; it is also one of the most important of all the conifers in northeastern North America. It is a tree of many uses. ...
    • Softwoods of North America 

      Alden, Harry A. (USDA Forest Service. Forest Products Laboratory, 1997)
      This report describes 52 taxa of North American softwoods, which are organized alphabetically by genus. Descriptions include scientific name, trade name, distribution, tree characteristics, ...