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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ossenbruggen, H. Sharon. - Gamal-Eldin, Jane. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: [Radnor, PA], U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, [1990?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library