The Online Books Page

Books by Robert R. Oberg:

Books in the extended shelves:

• Oberg, Robert R.: Crown release accelerates diameter growth and crown development of yellow birch saplings (U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1975), also by Gayne G. Erdmann, Richard M. Godman, and Minn.) North Central Forest Experiment Station (Saint Paul (page images at HathiTrust)
• Oberg, Robert R.: Fifteen-year results from six cutting methods in second-growth northern hardwoods (North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1973), also by Gayne G. Erdmann and Minn.) North Central Forest Experiment Station (Saint Paul (page images at HathiTrust)
• Oberg, Robert R.: Macronutrient deficiency symptoms in seedlings of four northern hardwoods (Dept. of Agriculture, Forest Service, North Central Forest Experiment Station : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1979), also by Gayne G. Erdmann, Frederick T. Metzger, United States Forest Service, and Minn.) North Central Forest Experiment Station (Saint Paul (page images at HathiTrust)
• Oberg, Robert R.: Volume tables for second-growth northern hardwood forests in northeastern Wisconsin (U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1982), also by Gayne G. Erdmann, Thomas R. Crow, and Minn.) North Central Forest Experiment Station (Saint Paul (page images at HathiTrust)

Find more by Robert R. Oberg at your library, or elsewhere.