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  1. By: United States. Northeastern Forest Experiment Station, Upper Darby, Pa.
    Publication info: Upper Darby, 1955
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: United States. Northeastern Forest Experiment Station, Upper Darby, Pa.
    Publication info: Upper Darby, 1956
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: United States. Northeastern Forest Experiment Station, Upper Darby, Pa. - Ferguson, Roland H.
    Publication info: Upper Darby, Pa, 1959
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: United States. Northeastern Forest Experiment Station, Upper Darby, Pa. - Webster, Henry H. - Stoltenberg, Carl H.
    Publication info: Upper Darby, 1958
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: United States. Northeastern Forest Experiment Station, Upper Darby, Pa. - McGuire, John R. - Ferguson, Roland H.
    Publication info: Upper Darby, 1957
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library