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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Abbott, Herschel G. (Herschel George), - Hart, Arthur C. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Upper Darby, Pa, Northeastern Forest Experiment Station, 1960
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Hart, Arthur C.
    Publication info: Upper Darby, Pa, Northeastern Forest Experiment Station, 1959
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library