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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Buttrick, John A. - Robinson, Donald F. - Bartlett, Robert - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Philadelphia, Pa, Northeastern Forest Experiment Station, 1946
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Buttrick, John A. - Robinson, Donald F. - Bartlett, Robert - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Philadelphia, Pa, Northeastern Forest Experiment Station, 1946
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Buttrick, John A. - Robinson, Donald F. - Bartlett, Robert - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Philadelphia, Pa, Northeastern Forest Experiment Station, 1946
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library